Interesting, but there's nothing in the video that doesn't describe what every Chronic Fatigue sufferer have been going through for decades, including the theory that the immune system being in overdrive and especially 'It's all in your head'.
Yes, it's interesting that the cause of chronic fatigue is unknown, but the leading suspicion is viral infections:
It makes sense to me that a virus that attacks so many body parts as Covid does can have such lasting effects. The crazy thing is these patients don't seem to be the ones who got a really bad case of Covid; they weren't in the ICU on a ventilator.
