Allergy is a disorder of the immune system which is a form of hypersensitivity. [1] Allergic reactions occur to normally harmless environmental substances known as allergens ...

Get the facts about allergic reactions, causes, allergy types (food, dust, mold, seasonal), symptoms and signs (skin rash, itching, red bumps, sneezing).

An allergy is a reaction of your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing.

allergy n. , pl. , -gies . An abnormally high sensitivity to certain substances, such as pollens, foods, or microorganisms

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Allergies affect nearly 20% of Americans. Here you'll find in-depth allergy information including treatments

In-depth look at this disorder including general information, environmental problems, food, medical problems, medicines, testing, allergy shots and frequently asked questions.

Has a wide variety of information on these disorders. You can search the site in several areas.

allergy, hypersensitive reaction of the body tissues of certain individuals to certain substances that, in similar amounts and circumstances, are innocuous to other persons.

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Allergy control products, allergy bedding, dust mite covers, air cleaners, cleaning products and other products that relieve allergy symptoms to dust mites, pets, pollen and mold.

allergy /al·ler·gy/ (al´er-je) a hypersensitive state acquired through exposure to a particular allergen, reexposure bringing to light an altered capacity to react.

noun pl. allergies-·gies. a hypersensitivity to a specific substance (such as a food, pollen, dust, etc.) or condition (as heat or cold) which in similar amounts or degrees is ...

al·ler·gy (l r-j) n. pl. al·ler·gies. 1. An abnormally high sensitivity to certain substances, such as pollens, foods, or microorganisms. Common indications of allergy may ...