NK Cells or Natural Killer Cells

NK cells are classified as a type of lymphocytes, best known as cells of the innate immune system. Unlike other types of lymphocytes, NK cells have unique mechanism to distinguish antigens, having ability to seek and destroy multiple pathogenic antigens without any priming activation such as cancer cells.

 

NK Cells are 15% of lymphocytes or about 2,000-5,000 million cells. Amount of NK cells are decreasing when the body is aging, weak, or frequently infected. Adequate amount of NK cells helps the body seeking and killing infected cells, having balanced and strong immune systems are keys for controlling and destroying infected cells.