Speaking of personality traits, I seem to remember Dr. Cheney once commenting that he had not noticed a difference in the rate of Type A or Type B people developing ME/CFS, but did notice that Type A people were less willing to scale back once they started going further into the illness, something that often made things worse.
And that was the reason Teitelbaum said what he did. He wasn't saying it's all in "Recovery Soon's" head, he was suggesting that one HAS to pull back, listen to your body, and slow down...waaaaaay down...or else no matter what you take, supplement or prescription, it won't do much good.
Stress...(which includes being too "driven") affects the immune system. Even Judy Mikovitz acknowledged that the XMRV retrovirus is "turned on" by stress...