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discuss the difference between tissue specific hypersensitivity and cell mediated hypersensitivity reactions

discuss the difference between tissue specific hypersensitivity and cell mediated hypersensitivity reactions
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Ans) Type IV hypersensitivity is a cell-mediated immune reaction. In other words, it does not involve the participation of antibodies but is due primarily to the interaction of T cells with antigens. The T cells involved in type IV reactions are memory cells derived from prior stimulation by the same antigen.

- Various autoimmune disorders as well as allergies fall under the umbrella of hypersensitivity reactions, the difference being that allergies are immune reactions to exogenous substances (antigens or allergens), whereas autoimmune diseases arise from an abnormal immune response to endogenous substances (autoantigens).

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