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Medical Term:

delayed reaction


a local or generalized response that begins 24–48 hours after exposure to an antigen involving sensitized T cells.

See: cell-mediated reaction

Synonym(s): contact hypersensitivity2, delayed hypersensitivity2, late reaction, late-phase reaction, tuberculin-type hypersensitivity

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.