Allergy 3


Allergy 3 : Abnormal immune response to an antigen (allergen) that does not normally cause an adverse reaction (e.g., animal dander, pollen). Allergic reactions are caused by the release of histamine by mast cells, a type of white blood cell. Allergic symptoms may include runny nose (rhinitis), skin rash, asthma, and anaphylactic shock
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