The type of adaptive immunity in which T cells destroy virus-infected or cancer cells is -mediated immunity.

The type of adaptive immunity in which T cells destroy virus-infected or cancer cells is called cell-mediated immunity. This specific immune response is carried out primarily by T lymphocytes (T cells), which play a crucial role in recognizing and eliminating infected or malignant cells. Unlike antibody-mediated immunity, which is associated with B cells and the production of antibodies, cell-mediated immunity focuses on the direct attack of affected cells by cytotoxic T cells. This mechanism is essential for controlling viral infections and tumors, as it allows the immune system to target and destroy cells that display abnormal or foreign antigens on their surface.