Video - Cell-mediated immunity of CD4 cells
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Video Summary
CD4 cells are white blood cells that play a vital role in the body's cell-mediated immunity. Cell-mediated immunity is the part of the immune system which relies on phagocytes, cytotoxic T-lymphocytes, and the release of various cytokines to fight off an infection. CD4 cells recognize and destroy infected cells by binding to special proteins on the surface of the infected cells called antigens. Once attached, the CD4 cells release molecules called cytokines which activate other immune cells to destroy the infected cell.
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