Central Memory T cells

Central memory T cells are a specialized type of immune cell that remains in the body after an infection has cleared. They "remember" previous pathogens, allowing the immune system to respond more quickly and effectively if the same threat appears again. These cells mainly reside in lymph nodes and circulate in the blood, acting as a rapid-response unit for future infections. Their ability to quickly activate the immune response helps protect the body from repeated infections and is a key aspect of long-term immune defense, including vaccine effectiveness.