Acquired immune system

The acquired immune system is the body's specialized defense that develops over time to fight specific pathogens like bacteria and viruses. It includes immune cells such as lymphocytes (B cells and T cells) that recognize and remember particular germs. When exposed to a pathogen, these cells generate a tailored response, producing antibodies and memory cells. This means that if the same germ invades again, the immune system responds more quickly and effectively. Vaccinations work by training the acquired immune system to recognize certain pathogens without causing illness, providing long-term protection.