You owe your life to your immune system. Without all of those antibodies and white blood cells and other warriors working in your defense, your body would soon be overridden with infections and cancers. But there's another side to the immune system. Like an army that suddenly turns against itself, the cells of the immune system can start attacking the body, resulting in an autoimmune disease. Millions of Americans live with some form of autoimmune disease. How much do you know about these disorders? Take this short quiz to find out.
First published Dec 18, 2003
Last updated Jul 24, 2007
Copyright © 2003
Consumer Health Interactive, a CVS Caremark company