Despite my efforts, it's difficult to come up with a poll to cover an illness that has so many potential factors contributing to it.
Yes, very difficult to come up with a poll that might give some answers to the question of contagion.
My answer could lead to a false conclusion, so perhaps I ought to change it. I voted female, viral onset, genetic family members with ME/CFS or symptoms.
My sister does not have ME/CFS, but she has some of my symptoms, which very likely are due to both of us having to drink water contaminated with perchlorate for 8 years when we were children. She
may have Hashi's (as I do), but just hasn't gotten to the hypothyroid stage. Or it
may be she has similar problems with her detoxification pathways.
My mother seems to have some of my methylation issues and has fatigue and overstimulation/overwhelm, but doesn't want to see a doctor.
Neither one has had a sudden metabolic crash with viral onset, as I did, at age 35, from EBV. And we were separated by distance at the time.
This doesn't mean that there isn't some unknown stealth virus or retrovirus that we got from our mother. Perhaps that is what predisposed my immune system to reactivate a latent virus.