My IQ was measured at over 4 SD above the mean. I have an auto-immune disease. My husband also has an IQ over 4 SD above the mean; he doesn't have an auto-immune disorder. Our HG son doesn't have an auto-immune disorder. Neither does his HG cousin. My *adoptive* mom, who was also HG, had Crohn's. Her HG brother and two sisters did not.
Both auto-immune disorders and intelligence have a significant genetic basis and high heritability. The fact that some gifted families also carry genes that predispose them to auto-immune disorders does NOT mean that giftedness predisposes you to auto-immune disorders or that auto-immune disorders make you gifted. It just means that both of those traits run in those families.
