Immunobiology
Natural killer (NK) cells are a type of lymphocyte in the innate immune system that play a crucial role in the body’s defense against tumors and virally infected cells. They act quickly to identify and eliminate these threats without the need for prior sensitization, which makes them essential for immediate immune responses. Their ability to recognize stressed cells in the absence of antibodies or major histocompatibility complex (MHC) molecules highlights their unique function in immune surveillance and responses to cellular abnormalities.
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