In people, IL2RA deficiency (26–28) or STAT5B gene mutations (29) has been correlated with diseases that manifest aspects of autoimmunity, and additionally, allelic variants of the IL-2 or IL-2R or downstream genes have been identified in association with increased risks for autoimmune inflammatory diseases [review in Abbas et al. and Humrich et al. (1, 30)]. Here, IL2RA is linked to Autoimmunity.