Type IV Hypersensitivity reaction and it’s mechanism
Type IV hypersensitivity reaction result from inappropriate T-cell activation. It takes at least 3 days to develop its action for this reason it is also called delayed type hypersensitivity (DTH). It is the only hypersensitivity category, that is purely cell mediated rather than antibody mediated. Mentioned disorders: Contact dermatitis, Chronic transplant rejection, Multiple sclerosis, Granuloma …
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