Can't test the breathing now, he is a bit too weak for that. But I think I can answer some of the others.
Shortness of breath, no, but having to have vomited for so long, his muscles are sore and tight, thus making it hard for him to draw air in.
No sniffles, nor cough. Temperature at 37,2°C
I've given him a lot of tea and hot water with curcumin like in Bangkok. He seems to be thinking it helps a bit. Vera made him some ramen Miso (miso, not ramen, my head doesn't work right) broth to regain a bit of lost nutrients.
Yep, doesn't seem like Covid19 alright. But I still have no idea where he could've gotten it from, as he didn't eat anything different from the rest of us. There's no way that could have happened. While there isn't a complete lock-down or curfews, we have all basically self-quarantined here.
That’s a relief that he is just stressed out! I think it’s partly psychological; the mind affects the body!
He must have some hidden fear or anxiety about the virus or something! Got to calm him down and make him believe that this will pass and that he just needs to take it easy. His nerves are very sensitive!
Entertain him with some funny story!
Good luck!