The immune system plays a vital role in maintaining overall health by defending against pathogens, such as bacteria and viruses. It is responsible for identifying and eliminating foreign invaders that can lead to illnesses. A strong immune system promotes recovery from infections and can help prevent chronic diseases. Maintaining immune health is influenced by factors like proper nutrition, regular exercise, adequate sleep, and stress management. Importantly, a well-functioning immune system contributes to overall resilience, enabling the body to adapt to various environmental challenges.