[seiferteric]

I really wonder if we will find these symptoms are caused by other viruses as well. Possibly candidate for chronic fatigue syndrome?

[aantix]

I think we’re in our infancy about determining root cause of most of our ailments. Your comment reminded me of this recent write up.

Adenoviruses: Causing Weight Gain and Obesity

https://www.geneticlifehacks.com/weight-loss-genetics-obesit...

[user568439]

One hypothesis is that long covid is caused by reactivated Epstein Barr virus or other herpes family virus.

It hasn’t been confirmed but it seems clear that the initial Covid infection has great impact to the immune system and triggers all sort of collateral effects.