Immune System can fight with your own body, leaving you vulnerable!

The immune system normally guards against germs like bacteria and viruses. When it senses these foreign invaders, it sends out an army of fighter cells to attack them. Normally, the immune system can tell the difference between foreign cells and your own cells. In an autoimmune disease, the immune system mistakes part of your body like your joints or skin as foreign. It releases proteins called autoantibodies...