Dictionary Definition

hypersensitivity

Noun

1 pathological sensitivity
2 extreme sensitivity

User Contributed Dictionary

English

Noun

Related terms

Translations

heightened immune response to an antigen

Extensive Definition

Hypersensitivity refers to undesirable (damaging, discomfort-producing and sometimes fatal) reactions produced by the normal immune system. 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.

Comparison table: Types 1-4

Synonyms, Antonyms and Related Words

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