Question

Definition of hypersensitity reaction in immunology

Answer 1

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Specialty. Allergology. Immunology.Hypersensitivity (also calledhypersensitivity reaction or intolerance) refers to undesirablereactions produced by the normal immune system, including allergies and autoimmunity.

Hypersensitivity (also called hypersensitivity reaction or intolerance) refers to undesirable reactions produced by the normal immune system, including allergies and autoimmunity. They are usually referred to as an over-reaction of the immune system and these reactions may be damaging, uncomfortable, or occasionally fatal. Hypersensitivity reactions require a pre-sensitized (immune) state of the host. They are classified in four groups after the proposal of P. G. H. Gell and Robin Coombs in 1963.

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