Mostly because if I get it I don't want to transmit it to my dad. Curious though, is there any logical way you could make the argument flu would be good for us? If it doesn't kill us that is. If the body tries to identify the strain of flu virus inside of it and destroy it, is it possible for cfs if it's a pathogen of any type, (lyme, fungus, EB, etc.) to be identified and destroyed or somehow inactivated by a hyperactive immune system in the process? Long shot I know. I think I posted a poll one time on this subject but don't know how to find it. How many people have had flu since they contracted CFS? I got CFS in my mid 30's I think my last case of flu was in my early 20's, I'm 58 now. Sometimes I wonder if cfs is some kind of hyper immune state already and that is why I haven't gotten it since. Likelihood though is that I am a home body now and don't get the type of exposure to it I might have once gotten.