delayed hypersensitivity

de·layed hypersensitivity

noun \di-ˌlād-\


: hypersensitivity (as in a tuberculin test) which is mediated by T cells and in which the typical symptoms of inflammation and induration appear in an individual previously exposed to an antigen after an interval of 12 to 48 hours following a subsequent exposure (as by injection of the antigen under the skin)

Seen & Heard

What made you want to look up delayed hypersensitivity? Please tell us where you read or heard it (including the quote, if possible).