allergy
allergy Hypersensitivity of the body’s immune system in response to exposure to specific substances (antigens), such as pollen, bee stings, poison ivy, drugs, or foods. See also allergic reaction; anaphylactic shock.
allergy Hypersensitivity of the body’s immune system in response to exposure to specific substances (antigens), such as pollen, bee stings, poison ivy, drugs, or foods. See also allergic reaction; anaphylactic shock.