(University of Alberta Faculty of Medicine & Dentistry) Researchers in the Faculty of Medicine & Dentistry at the University of Alberta have made an important discovery that provides a new understanding of how our immune system "learns" not to attack our own body, and this could affect the way doctors treat patients with autoimmune diseases and cancer.
http://www.eurekalert.org/pub_releases/2011-04/uoaf-dcc042611.php