The immune system plays a crucial role in maintaining overall health by defending the body against pathogens, including viruses and bacteria. It comprises various cells and proteins that work together to identify and eliminate foreign invaders. A healthy immune system can prevent infections and help manage inflammatory responses. Factors such as proper nutrition, regular exercise, adequate sleep, and managing stress significantly influence immune function. Keeping the immune system robust is essential for overall health, as it helps sustain vitality and reduces susceptibility to illnesses and chronic diseases.