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delayed hypersensitivity(DH)
, delayed-type hypersensitivityDTH
hypersensitivity that takes hours or sometimes a few days to develop; this type can be transferred by lymphocytes but not
by serum and can be induced by most viral infections, many bacterial infections, all mycotic infections, and a few protozoal
infections. The scope of this term is sometimes expanded to cover all aspects of cell-mediated immunity, including allergic contact dermatitis, granulomatous reactions, and allograft rejection.

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