Cell-mediated immunity is a crucial aspect of the adaptive immune response that involves the activation of T lymphocytes, which play a key role in defending the body against intracellular pathogens, such as viruses and some bacteria. This type of immunity does not rely on antibodies but instead involves direct cell-to-cell interactions and the release of cytokines to eliminate infected cells and coordinate the immune response. It is essential for recognizing and responding to cells that have been altered by infection or cancer.
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