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    Allergens   

 Allergies 

  Abnormal Reactions      

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ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

ALLERGIES -  hypersensitive reaction by the body to foreign substances - antigens,  that in similar amounts and circumstances are harmless within the bodies of other people.

Antigen - Any substance that the body regards as foreign and that therefore elicits an immune response. Antigens may be formed in, or introduced into, the body. They are usually proteins. Histo-compatibility antigens are associated with the tissues and are involved in the rejection of tissue or organ grafts; an example is the group of antigens encoded by the HLA system. A graft will be rejected if the recipient’s body regards such antigens on the donor’s tissues as foreign. 

Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells.

Allergic reactions with immediate effects are the result of antibody-antigen responses (i.e., they are the products of B-cell stimulation). These can be divided into three basic types.

  ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

During an average lifetime, in the Western World, we eat over 60,000 pounds, or over 27,000 kilograms of food. This is the weight of six large elephants. Much of it can cause us to have allergies.

There maybe 20 million people in the UK, and 120 million in the USA,  who suffer with allergies, of some degree,  that is at least one person in three.  This is a three-fold increase in only 20 years. 

Type I reactions, which include hay fever, insect venom allergy, and asthma, involve the class of antibodies known as immunoglobulin E (IgE). IgE molecules are bound to mast cells, which are found in loose connective tissue. When enough antigen has bound with the IgE antibodies, the mast cells release granules of histamine and heparin and produce other agents such as the leukotrienes. These potent chemicals dilate blood vessels and constrict bronchial air passages. Histamine is responsible for the visible symptoms of an allergic attack, such as running nose, wheezing, and tissue swelling. A severe, often fatal, type I allergic reaction is known as anaphylaxis. The predisposition of a person to type I allergic reactions is genetically determined. The best protection against such allergies is avoidance of the offending substance. Antihistamine drugs are often used to give temporary relief. Another helpful measure is desensitization, in which increasing amounts of the antigen are injected over a period of time until the sufferer no longer experiences an allergic response.

Histamine - Biologically active substance found in a great variety of living organisms. It is distributed widely, albeit unevenly, throughout the animal kingdom and is present in many plants and bacteria and in insect venom. Histamine is chemically classified as an amine, an organic molecule based on the structure of ammonia (NH3). It is formed by the decarboxylation - the removal of a carboxyl group, of the amino acid histidine.

The English scientists George Barger and Henry H. Dale first isolated histamine from the plant fungus ergot in 1910, and in 1911 they isolated the substance from animal tissues. Plants that produce histamine include stinging nettles; the histamine in the hair like structures on nettle leaves is partly responsible for the swelling and itching produced by contact with them. Histamine is also the irritating ingredient present in the venom of many species of wasps and bees.

In humans histamine is found in nearly all tissues of the body, where it is stored primarily in the granules of tissue mast cells. The blood cells called basophils also harbor histamine-containing granules. Once released from its granules, histamine produces many varied effects within the body, including the contraction of smooth muscle tissues of the lungs, uterus, and stomach; the dilation of blood vessels, which increases permeability and lowers blood pressure; the stimulation of gastric acid secretion in the stomach; and the acceleration of heart rate. Histamine also serves as a neurotransmitter, carrying chemical messages between nerve cells.

The effect histamine has on blood vessels is crucial to its role in the immune response, which is most clearly glimpsed in inflammation—i.e., the local reaction of bodily tissues to injury caused by physical damage, infection, or allergic reaction. Injured tissue mast cells release histamine, causing the surrounding blood vessels to dilate and increase in permeability. This allows fluid and cells of the immune system, such as leukocytes and blood plasma proteins, to leak from the bloodstream through the vessel walls and migrate to the site of tissue injury or infection, where they begin to fight the infection and nourish and heal the injured tissues.

In an allergic reaction—the immune system's hypersensitivity reaction to usually harmless foreign substances (called antigens in this context) that enter the body—mast cells release histamine in inordinate amounts. Immune system proteins called antibodies, which are bound to mast cells, bind to the antigens to remove them, but in the process the mast cells are stimulated to release their histamines. This causes the visible symptoms of a localized allergic reaction, including runny nose, watery eyes, constriction of bronchi, and tissue swelling. Histamine also contributes to generalized allergic conditions such as anaphylaxis, a severe, immediate, and often fatal response to exposure to a previously encountered antigen.

Histamine works by binding to histamine receptors on the surface of cells. There are three kinds of receptors, called H1,H2, and H3. The activity of histamine can be blocked by various chemical drugs called antihistamines, which prevent the binding of histamine to these receptors. Conventional antihistamines used to treat allergies block H1 receptors and thus are called H1 antagonists. H2 antagonists are those drugs, such as cimetidine (Tagamet), that inhibit gastric acid secretion and are used to help heal peptic ulcers.

Type II reactions result when antibodies react with antigens that are found on certain “target” cells. The antigens may be natural components of healthy cells, or they may be extrinsic components induced by drugs or infectious microbes. The resultant antigen-antibody complex activates the complement system, a series of potent enzymes that destroy the target cell.

Type III reactions result when a person who has been strongly sensitized to a particular antigen is subsequently exposed to that antigen. In a type III reaction, the antigen-antibody complex becomes deposited on the walls of the small blood vessels. The complex then triggers the complement system, which produces inflammation and vascular damage. Unlike type I reactions, type II and type III reactions are not dependent on a genetic predisposition. Avoidance of known allergens is the best protection against such reactions.

Delayed, or type IV, allergic reactions are caused by the actions of T cells, which take longer to accumulate at the site where the antigen is present than do B-cell antibodies. The allergic responses appear 12 to 24 hours or more after exposure to an appropriate antigen. A common delayed allergic reaction is contact dermatitis, a skin disorder. The rejection of transplanted organs is also mediated by T cells and thus may be considered a delayed allergic response.

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

   Allergy    

Asthma is a chronic lung condition. It is characterized by difficulty in breathing. People with asthma have extra sensitive or hyperresponsive airways. The airways react by narrowing or obstructing when they become irritated. This makes it difficult for the air to move in and out. This narrowing or obstruction can cause one or a combination of the following symptoms: wheezing, coughing, shortness of breath, chest tightness

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Allergy    -   An abnormal reaction by the body to certain substances, including pollen, dust, certain foods and drugs, fur, moulds, etc. Normally all foreign substances - antigens, entering the body are destroyed by antibodies. Allergic people, however, become irregularly hypersensitive to certain antigens, and these are called allergens, so that whenever they are encountered after the first time, they irregularly stimulate not only the normal antibody reaction, but also the abnormal symptoms of the allergy, such as sneezing and skin rashes, and lastly Anaphylactic shock. You can get allergic reactions at any age, and they can start at any age, even with stuff you have been using all your life.

Mould Spore

Allergic conditions include hay fever, some forms of asthma and dermatitis, urticaria, coma and death. Treatment includes the use of antihistamines and corticosteroids and adrenalin. 

You can get it at any age, but children are the most effected. 

The exact cause of asthma isn't clear but a combination of genetic pre-disposition and environmental influences can lead to increased reactivity of the airways. These influences include atopy - an inherited tendency to allergic disease including eczema, hay fever and other types of allergic rhinitis that affects a large number of children with asthma. Once the airways are hyper-reactive, a variety of triggers cause the sensitised lungs to react, leading to an asthma attack. Triggers of asthma attacks include respiratory tract infections, allergens (particles that cause an allergic response, such as house dust mites or pollen), smoking, exercise, cold air, emotional upsets and chemical irritants

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Fungi    -   A group of orgasms usually regarded as plants and including mushrooms, mildews, moulds, yeasts, etc. All fungi lack chlorophyll and therefore cannot manufacture their own food through photosynthesis. Some feed on dead organic matter; others are parasites. The body of most fungi consists of a network of branching threadlike structures (hyphae), forming a mycelium. Sexual reproduction results in the formation of spores, which may be produced in a structure called a fruiting body: this is the visible part of mushrooms. Other fungi consist of single cells, which can reproduce asexually by simple division. Fungi are found worldwide. Some bring about decomposition of dead organic matter, like bacteria; others (e.g. Penicillium and Streptomyces) are a source of antibiotics. Many parasitic fungi cause diseases or destroy timber (see dry rot). Some fungi associate with algae to form lichens.

Fungi on humans are multi-celled, plant-like organisms that usually are not dangerous to a healthy person. Fungi cannot produce their own food from soil, water, and air, so instead, they get nutrition from plants, food, and animals in damp, warm environments, that is they feed off you as they would a rotting tree. 

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

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ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Allergic people, however, become irregularly hypersensitive to certain antigens, and these are called allergens, so that whenever they are encountered after the first time, they irregularly stimulate not only the normal antibody reaction, but also the abnormal symptoms of the allergy, such as sneezing and skin rashes, and lastly Anaphylactic shock. 

Allergy - the classic sign of an allergy is sneezing.

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

 

 Allergies 

  Abnormal Reactions    

 

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

    

What is An Allergy ?

All About Allergies

The effects from allergies, whilst understood on a mechanical level, are often referred to being  idiopathic, that is not really knowing why they exist.

Allergy is a physiological outcome or reaction produced when the immune system wrongly identifies normally harmless substances as being detrimental to the body.

  ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Physiology / physiological    -   The study of how living organisms and their constituent parts function. Physiology is closely linked with both anatomy and biochemistry.

Anatomy  -   The study of the structure of living organisms. Early studies of human anatomy were made by the Greek physician Galen, in the 2nd century AD, but it was not until the 16th century that dissecting human corpses became acceptable and anatomists - notably Vesalius - made valuable contributions to the science. In the 17th century William Harvey discovered the circulation of blood and the development of the microscope enabled advances in the detailed structure of the body to be made by such microscopists as Malpighi, Leeuwenhoek, and Swammerdam. In the 20th century anatomy was greatly assisted by the development of the electron microscope, which allowed much finer detail to be studied. Specialized branches of anatomy include embryology (the study of development), histology (tissues), and cytology (cells).

Biochemistry  - The scientific study of the chemical composition and reactions of living organisms. Discovering the complex sequence of reactions involved in the digestion of food, the utilization of energy, the manufacture of new tissues, etc., gives us an understanding of an organism’s metabolism. Biochemists are also concerned with the role of *genes, *hormones, and *enzymes in starting and controlling metabolic reactions.

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For this article, the Body, a noun  - The  whole physical structure, including the bones, flesh, and organs, of a person or an animal, whether dead or alive. 

Allergic people, however, become irregularly hypersensitive to certain antigens, and these are called allergens, so that whenever they are encountered after the first time, they irregularly stimulate not only the normal antibody reaction, but also the abnormal symptoms of the allergy, such as sneezing and skin rashes, and lastly Anaphylactic shock. 

As a rule, the human-body defends itself against harmful foreign bodies, such as viruses, or germs, but sometimes the defense system also aggressively attacks usually innocent substances, such as dust, mold, or pollen; substances that would normally be harmless. 

The immune system generates large amounts of proteins that function as antibodies, these proteins are called immunoglobulin; complex chemical weaponry that attacks, engulfs and destroys any active substance that enters the body. The Immune system presumes that this active substance is the supposed enemy and it does its job through automatic instructions that have evolved over billions of generations. Active means that it is in a state, that can be changed; some plastics or metals will be ignored by the immune system, as being invisible.

WHY

Occasionally, a propensity arises that makes the immune system attack these innocent substances. Each antibody specifically targets a particular allergen - the substance that causes the allergy. In this disease-fighting process, inflammatory chemicals like histamines, cytokines, and leukotrienes are released or produced, and some unpleasant and in some extreme cases, life-threatening symptoms may be experienced, by the person who has a propensity to be prone to allergies. 

In our ancestry the immune system evolved to help us, probably more than any other bodily function and because it did it a billion times something altered or mutated, that changed what Mother Nature designed it to do. This fault or propensity was carried on in the genetic line and either got stronger or weaker. This being, if your mother suffers with allergies and so does your father, there is a good chance that you will suffer also, as the condition runs in families, giving  a genetic predisposition to it. 

But also it is believed that the mother's diet can affect her fetus, making a person sensitized in the womb, to a certain substance.  

We are fast becoming allergic to our modern world. There maybe 20 million people in the UK, and 120 million in the USA,  who suffer with allergies, of some degree,  that is at least one person in three. This is a three-fold increase in only 20 years. 

Why this crucial change?  Many think we are too clean and our immune system is being conditioned to work to certain pattern and tolerations and thus will treat our outside world much differently than say it did 30 years ago. Those who suffer allergies have a different gut flora than those who do not. This means that there are different and or more good bacteria in people's stomachs, who do not suffer, than those who do.

Today we have much less dirt in our homes, especially in the kitchens and bathrooms. But our homes contain many more chemicals and by-products not seen before. There are a million more concoctions that we can be exposed to, that may or may not produce a reaction.  Outside is filled with fumes and chemicals, that were not about a few decades ago.

Our food is fresher, and more germ free, and contains many more colors, E-Numbers, and preservatives and preventatives. Milk and many other products are pasteurized.  Our immune system developed over many thousands of years, and until recently, it was hit with a million germs / substances, throughout a lifetime. Today we almost live in a bubble, and so the immune system has taken on a different profile and looks to challenge other things, like food; maybe the Devil makes work for idle hands.

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

 

  

 

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

A reaction might be from something that has not happened before, you may be stung by a wasp or bee, and suffer no consequence. Stings like these are hugely complex chemical compounds.  Next time, because the body has changed in some attempt to protect you, the protection backfires.

Bee

  ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Eczema, or dermatitis as it is sometimes called, is a group of skin conditions which can affect all age groups. In the United Kingdom, up to one fifth of all children of school age have eczema, along with about one in twelve of the adult population. The severity of the disease can vary. In mild forms the skin is dry, hot and itchy, whilst in more severe forms the skin can become broken, raw and bleeding. Although it can sometimes look unpleasant, eczema is not contagious. With treatment the inflammation of eczema can be reduced, though the skin will always be sensitive to flare-ups and need extra care.

It is a fault that happens because it does; in any operation or scenario that is repeated a billion times, chaos theory predicts that something will and almost must go wrong. Ask a factory worker who churns out a million widgets a day, whilst almost all might be perfect there will be some small peculiarity or effect that will happen that will make a small number of them imperfect and therefore rejected.

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Immunity  -  The resistance of the body to infection, especially resistance due to antibodies. Babies have passive immunity from antibodies transferred from the mother’s blood through the placenta. Active immunity involves the formation of antibodies after exposure to an antigen  - bacteria that invade the body during an infection are antigens. The two different kinds of immune response produced by antibodies involve: white blood cells called T-lymphocytes  -  produced by the thymus, which produce cells with antibody bound to their surface and are responsible for such reactions as graft rejection; B-lymphocytes, which produce cells that release free antibody into the blood.

Immunoglobulin - noun - Any of a group of related proteins functioning as antibodies.

   ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

What are Allergic Reactions?

An allergic reaction may take place anywhere in or on the body, in or on the skin, in or on the eyes, the lining of the stomach, nose, sinuses, throat, and lungs. These are places where battles usually take place; places where immune system cells are generally located to fight off invaders that are inhaled, swallowed, or come in contact with the skin.

Anaphylactic Shock

Anaphylactic shock is a severe systemic Type 1 consequence to having a serious allergic reaction to something called an antigen - a substance that produces antibodies, and it can happen very quickly. Large quantities of an antibody called immuno-globin E are formed in the body, these cause a variety of effects on the body's cells and tissues. In particular, it causes the body to release an excess amount of histamine, a very dangerous chemical in large doses.  It slows the heart-rate and reduces blood pressure to dangerous levels 

It is in fact an often fatal medical emergency, and requires an immediate injection of adrenalin and or large doses of antihistamine. But so quick is the adverse reaction that patients sometimes do not have enough time to inject themselves, with their Epi-Pen. 

  

Anaphylaxis

Anaphylaxis is a sudden, severe, potentially fatal, systemic allergic reaction that can involve various areas of the body (such as the skin, respiratory tract, gastrointestinal tract, and cardiovascular system). Symptoms occur within minutes to two hours after contact with the allergy-causing substance, but in rare instances may occur up to four hours later. Anaphylactic reactions can be mild to life-threatening. Individuals with asthma, eczema, or hay fever are at greater risk of experiencing anaphylaxis.

     ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

The leukocytes, or white blood cells, guard and protect the body against infecting organisms and foreign bodies, both in the tissues and in the bloodstream itself. Human blood contains about 5,000 to 10,000 leukocytes per cubic millimeter. This amount increases in the incidence of infection; the body will produce more and others will travel to an infection site. An extraordinary and prolonged proliferation of leukocytes is known as leukemia . This over production stifles the production of normal blood cells. Conversely, a sharp decrease in the number of leukocytes, called leukopenia,  strips the blood of its defense against infection, and is an equally critical condition. A dramatic fall in levels of certain white blood cells, occurs in persons with AIDS. Leukocytes as well as erythrocytes are formed from stem cells in the bone marrow. They have nuclei and are classified into two groups: granulocytes and agranulocytes.

Symptoms

    ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Eyes are very sensitive and therefore very susceptible to attack from this condition. Rubbing the eyes will make thing worse. See your doctor.

The outward signs that  your body is responding to allergens give symptoms such as:

  • Stuffy nose

  • allergic conjunctivitis - red, itchy, watery eyes

  • Runny nose

  • Atopic dermatitis - Eczema - red, itchy, dry skin

  • Sneezing, wheezing, shortness of breath

  • urticaria - hives or itchy welts

  • Itchy, watery eyes

  • A drip in the back of the throat that may cause coughing

  • contact dermatitis - itchy rash

  • asthma - unexplained shortness of breath, coughing, 

  • itching in ears or roof of mouth.

  • Rhinitis - stuffiness, sneezing, nasal itching, nasal discharge

ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

What causes allergic reactions?

Although hundreds of ordinary substances could trigger allergic reactions, the most common triggers - called allergens - include the following:

  • pollens

  • molds

  • household dust, which is 95% human skin flakes

  • dust mites and their waste

  • animal proteins, like dander, urine, oil from skin

  • industrial chemicals

  • various foods

  • nuts

  • wheat

  • medicines

  • Milk

  • Latex

  • feathers

  • insect stings

  • cockroaches and their waste

  • parasite bites

  • ALMOST ANYTHING

Mosquito A small flying insect that could be described as a type of Fly. It lives worldwide, especially in the tropics. It has long legs and a slender abdomen, Culex Forma. In most species the males feed on plant juices, while the females suck the blood of mammals, quite often transmitting serious diseases, including malaria and yellow fever.

Who is affected by allergy?

Allergies can affect everyone, despite age, gender, race, or socio-economic status. Generally, allergies are more widespread in children. However, a first-time occurrence can happen at any age, or recur after several years of remission. The trigger may act in tandem with a psychological event. Such as even being stressed about getting the symptoms; becoming short of breath when you do not know why, does not help.

   ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Psychology - The scientific study of the behavior of man and animals. Different schools of psychology use differing methods and theories. Clinical psychology applies the observations of psychologists to the understanding and treatment of mental illness, see psychiatry; psychoanalysis. Educational psychology studies the ways in which children learn, in order to improve teaching methods. See also ethology.

There is a predisposition for allergies to occur in families, see above, although the exact genetic factors that cause it, are not yet totally understood. In predisposed people, factors such as hormones, stress, smoke, perfume, and or other environmental irritants, may also play a part in this situation, adding to its intensity . Often, the symptoms of allergies develop gradually over a period of time, and it is said that if, we knew what could potentially cause an allergy, that substance could be avoided by the patient.

Some allergy sufferers become so accustomed to some chronic symptoms, such as sneezing, nasal congestion, runny nose, eyes watering, or wheezing, that they do not consider their symptoms to be unusual, or even due to having an allergy. They go through life living with unnecessary suffering.

Many cold like symptoms are presumed to be colds or flu, when in fact they are the reaction to some substance that the body considers alien. So when you believe that you have caught another cold yet again, the truth is that you might not have had a cold for years, it is just that the symptoms of being allergic are similar to having a cold.

Allergists

With the support of an allergist, these symptoms can usually be prevented or at least controlled; diminished enough so that the quality of life is greatly improved. 

With clear thinking, it is possible to take control of the situation and manage the problem. Anti-Histamine tablets are good, avoiding the allergen, taking quick action, when you feel the symptoms coming on.

How is allergy diagnosed?

In addition to performing a clinical examination and taking a medical history, a doctor may also use:

  • a skin test
     The skin test is a method of measuring the patient's level of reaction to antibodies to specific allergens. Using diluted solutions of a specific group of common allergens, a doctor or nurse can either inject the patient with the solutions, or apply them to a small scratch or puncture. A reaction appears as a small red area on the skin, the intensity of this gives you an idea about how severe an allergy might be. However, a reaction to the skin test does not always mean that the patient is allergic to the allergen that caused the reaction.

  • a blood test
     The blood test is used to measure the patient's level of reaction to antibodies to specific allergens. One common blood test is called RAST or radioallergosorbent test .

When you know what you are allergic to, you can avoid this allergen, or at least steer clear of it to the best of your ability. Sometimes knowing what you are allergic to, gives you a psychological edge, and improves your situation.

Treatment for Allergic Reactions

Specific treatment for an allergy will be determined by your medical representative and is based on:

  • Your age, overall health, and medical history

  • The extent of the condition

  • Your tolerance for specific medications, procedures, or therapies

  • Expectations for the course of the condition

  • Even your opinion or preference

   ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people. Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu. - foogle.biz - What, Who, Where, When, Why, Which, Will, How, Do

Whether it be drugs or counseling, whatever regime you take will help you control this problem, as there is not a cure. We predict that by the year 2100, if we are all still here, 90% of the Western Civilization will suffer from one kind of allergy or another. It is reckoned that by 2015, 50% of the population of Europe and the USA, will be sufferers. With the increase of diseases like asthma and increased stress levels, and the propensity to suffer this predicament that is carried in our genes, we can see no end to it at present.

Before the Second World War, people going to their doctors for allergies was practically nil. In 1965, 5% of the population had some problems. In 2005, 25% have a problem that has an effect on them. Over 90% of the stuff we are commonly influenced by was not around during WWII. 

   ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.ALLERGIES - hypersensitive reaction by the body to foreign substances - antigens, that in similar amounts and circumstances are harmless within the bodies of other people.Antigens that provoke an allergic reaction are called allergens. Typical allergens include pollens, drugs, lints, bacteria, foods, and dyes or chemicals. The immune system contains several mechanisms that normally protect the body against antigens. Prominent among these are the lymphocytes, cells that are specialized to react to specific antigens. There are two kinds of lymphocytes—B cells and T cells. B cells produce antibodies, which are proteins that bind to and destroy or neutralize antigens. T cells do not produce antibodies; instead, they bind directly to an antigen and stimulate an attack on it. Allergic reactions can have immediate or delayed effects, depending on whether the antigen triggers a response by B cells or T cells. Sneezing / runny nose / colds / flu.