Vol. 21. Detroit: Gale, 2005. 187-192. Gale Virtual Reference Library.
The immune system consists of a defense system that shields the body against invasion from infections and other diseases. Normally, a healthy person's immune system has the ability to differentiate between its own cells and cells that represent threats to the health of the body. (Craft and Kanter, 2002). The term "autoimmune disease" refers to a wide-range of well over 80 acute, long-lasting diseases that involve nearly every organ in the body's system. With autoimmune diseases, the underlying issue is similar--the body's immune system becomes misdirected, attacking the precise organs it was intended to guard.
Gale Virtual Reference Library. Web. 23 Mar. 2011.