@Prof. with all do respect, but this is nonsense. Take a pick from the abundant literature on Tregs and their role the play in autoimmunity, cancer or chronic infections. First page from google Treg autoimmunity . The topic has relived a renaissance. Inducing Tregs is quiet a topic in transplantation and autoimmmunity right now. Or maybe I can entice you to read an Article by Richard A. Peterson, GlaxoSmithKline, which gives a short historical overview and summarizes the role of T- regulatory cells in various diseases.