“See no evil, hear no evil, do not evil: The lessons of immune privilege” is the title of an excellent paper by Jerry Niederkorn in nature immunology. He basically says that there are only 3 human organs that allow foreign tissue grafts: eye, brain and pregnant uterus. If we leave the special situation of the uterus aside, and see the yes as an extension of the brain – there is only the brain that is no attcked by the immune self. Being still under influence of the Popper/Eccles discussion of the brain and its self , here is my back on the envelope picture of social self < -> immune self < -> conscious mind. Yea, yea.