Your body’s defence against illness and disease
The immune system is a network of cells, tissues, and organs that work together to protect your body through a series of steps called the immune response. When germs and microorganisms enter the body, the immune system attacks with two types of white blood cells: Phagocytes, cells that destroy invading organisms and lymphocytes, cells that recognize and remember previous invaders to help the body destroy them next time.
Creating and maintaining good health is the best way to keep your immune system strong and healthy.