Home Biology Human Health and Disease Skill Builder Type A immunity targets virus or parasite in…
Biology Human Health and Disease Skill Builder Single Correct MCQ
Published on: August 21, 2026

Type A immunity targets virus or parasite infected tissue cells cancer cells or graft cells. It can also lyse cells or release chemicals that enhance inflammation. Here, A refers to:

A
Cell-mediated immunity
B
Humoral immunity
C
Acquired immunity
D
Innate immunity

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Cell-mediated immunity is an immune response that does not secrete antibodies but activation of phagocytes, antigen-specific cytotoxic T-lymphocytes, and the release of various cytokines in response to a foreign antigen, virus or parasite cells. The body is able to differentiate 'self' and 'non-self' and the cell-mediated immune response is responsible for the graft rejection.

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