memory T cells

Memory T cells are a specialized type of immune cell that "remembers" past infections or vaccinations. After your body encounters a virus or bacteria, some T cells remain in your blood and tissues, ready to quickly recognize and attack the same pathogen if it invades again. This rapid response helps your immune system protect you more effectively during future encounters. Essentially, memory T cells act as a biological "reminder," enhancing your body's ability to fight off illnesses you've previously encountered, which is the principle behind vaccines and immune memory.