That link is just awful partisan politics. It’s unfortunate that LongCovid is getting swept up into the culture wars. Obviously genetic predispositions are inherited and will be a strong predictor. There is very little difference between ME/CFS and LC, many of these kids will have inherited ME/CFS but would not have been aware of it until awareness of LC picked up. In addition the vaccine is sufficient to cause LC in those predisposed to it. My pre-existing ME/CFS was made substantially worse due to the vaccine and I have not yet had covid. I do have extremely strong ACE2-AAbs which is a marker for LongCovid.