Both my kids who had glanfular fever and developed subsequent pvfs did not have severe glandular fever at the time. In fact testing for glandular fever was done after some months as they did not start to recover - backtracked to timing of not feeling well with sore throat for guesstimate of infection. They were not off school for very long for glandular fever itself.These two observations mentioned in the NYT article seem like a bit of a conundrum:
[my bolding]
Perhaps the severity of initial acute symptoms is only weakly associated with the onset of ME/CFS following infection, or perhaps long Covid and ME/CFS are similar but not identical, or maybe there is something particularly unique about SARS-CovV-2 that makes it unusually good at inducing persistent symptoms regardless of initial severity. It would be interesting to know what that attribute is.
ETA: Obviously, the genetics of the patient could have a lot to do with this.
It took my son around 18 months to start improving . During that period he had issues with lymphs ( particularly throat) , crippling headaches ( to extent lumber puncture was done ) , sleep reversal and fatigue. But not fatiguability, no PEM. He was 16, so no paediatric input .
My daughter had headaches and fatigue, with PEM ( though we did not know what that was ) and classic symptoms, many of which the paediatrician was clueless about.
I dread to think where they would be now if severity of onset is a robust predictor.
ETA. Daughter 15 when it occurred.
Perhaps this follows the observation that males recover and females don't.