What are the major functions of your immune system?

The immune system serves several crucial functions, including identifying and neutralizing pathogens such as bacteria, viruses, and fungi. It also distinguishes between the body’s own cells and foreign invaders, preventing autoimmune reactions. Additionally, the immune system plays a key role in the healing process by repairing damaged tissues and providing long-term immunity through memory cells. Overall, it acts as the body's defense mechanism, maintaining overall health and resilience against infections.