Allergic reactions are a serious condition many Americans face due to an abnormal immune response in the body that, in some cases, can result in death. An allergic reaction occurs when the immune ...

We all overreact to certain situations in life—some of us more than others (slowly raises hand). But when your immune system overreacts to a harmless substance, also known as an allergen, your body ...

There are many types of allergies, including seasonal, food, drug, pet, mold, insect, and latex allergies. An allergy is an overactive immune response to a substance called an allergen that is usually ...

Allergies are over-reactions of the immune system in certain individuals to seemingly and generally harmless foreign proteins and substances. Allergies usually do not occur at the first exposure. When ...

Allergic contact dermatitis represents a delayed-type hypersensitivity reaction (Type IV hypersensitivity). There are four types of hypersensitivity reactions, which include Type I, immediate-type-IgE ...

Drug hypersensitivity reactions are drug reactions which are unpredictable. They result from an interaction between a drug substance and the immune system of a hypersensitive person. Hypersensitivity ...