News tagged with hypersensitivity

Hypersensitivity (also called hypersensitivity reaction) refers to undesirable reactions produced by the normal immune system. These reactions may be damaging, uncomfortable, or occasionally fatal. Hypersensitivity reactions require a pre-sensitized (immune) state of the host. The four-group classification was expounded by P. H. G. Gell and Robin Coombs in 1963.

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