What is a hypersensitivity?

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Definitions. Hypersensitivity reaction: a condition in which the normally protective immune system has a harmful effect on the body. Allergy: an abnormal immunological response to an otherwise harmless environmental stimulus (e.g., food, pollen, animal dander)7 days ago.
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Definitions. Hypersensitivity reaction: a condition in which the normally protective immune system has a harmful effect on the body. Allergy: an abnormal immunological response to an otherwise harmless environmental stimulus (e.g., food, pollen, animal dander)7 days ago.