Your immune system defends your body against infections and illnesses. It makes proteins called antibodies that counteract or kill germs, like viruses and bacteria. You get protection, or “immunity,” ...

Your immune system does a lot of amazing things. Keeping this system strong helps it fight off infections so you can stay healthy. Although you’re born with all the cells of your immune system, it ...

The immune system is the body’s tool for preventing or limiting infection. Its complex network of cells, organs, proteins, and tissues enables the immune system to defend the body from pathogens. A ...