Your immune system is the network of cells and tissues in your body that work together to defend you from viruses, bacteria, and infection. It tries to identify and destroy the invaders that might hurt you. In autoimmune diseases, proteins known as autoantibodies target the body’s own healthy tissues by mistake, signaling the body to attack them. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.