hi, I think that Dr Chia is wrong, it's the typical mistake of doctors when they don't find the cause/explanation
of a pathology, it has been like this throughout the history of medicine, as has happened in recent decades with Helicopter Pylory (stress, diet, fat, smoking, trauma........it was just a bacterium that managed to live in the stomach.) or for HIV (eating disorders, psychological disorders, stress, repeated infections, sins........it was an unknown virus.), so in ME, I am convinced, it is just another unknown virus.......
If I hadn't noticed that other people were getting sick around me I would have also accepted his hypothesis (like the others), but in 38 years of ME I am convinced that our illness is caused by a single germ (virus?) and nothing other; certainly the health/genetic history of each patient influences the severity and prevalence of some symptoms....in fact we recently had the teaching of Covid19. With this new virus, 70% of those infected had mild symptoms and 30% of these didn't even notice... (as in ME), 5%(?) had pneumonia (like serious ME sufferers), some had prevalence of gastric symptoms, other sore throat and cough, etc., naturally they had: tiredness, joint pain, drowsiness, cognitive fog, weak memory as the majority of virosis damage.
ciao