Natural killer (NK) cells

Natural killer (NK) cells are a type of immune cell that helps defend the body against infections and cancer. They can recognize and destroy infected or abnormal cells without needing prior exposure or antibodies. NK cells identify targets by sensing signs of stress or abnormalities on cell surfaces. Once activated, they release chemicals that kill these harmful cells quickly. They play a crucial role in early immune responses, working alongside other immune cells to keep the body healthy. Their ability to act swiftly makes them an essential part of the immune system’s defense mechanisms.