NK Cells (Natural Killer Cells)

Natural Killer (NK) cells are a type of immune cell that play a crucial role in the body's defense against viruses and cancer. They can identify and destroy infected or abnormal cells without needing prior exposure or antibodies. NK cells do this by detecting signs of stress or danger on target cells and releasing chemicals that kill these cells. This rapid response helps prevent infections from spreading and controls early tumor growth. Overall, NK cells are an essential part of the innate immune system, providing immediate protection and working alongside other immune defenses.