The immune system is the body system that provides protection from colds and the flu. The immune system is responsible for recognizing and defending against pathogens such as viruses and bacteria that can cause these illnesses. It is made up of a complex network of cells, tissues, and organs that work together to identify and destroy these harmful invaders. Keeping the immune system healthy and strong through proper nutrition, exercise, rest, and hygiene practices can help prevent colds and the flu.
