Oh, more news that might be helpful. I read This morning that during the 1918 flu outbreak several hospitals found that when they were out of space and literally had to put patients outside or in makeshift tents( the pictures shown looked like there was lots of fresh air ventilation through open sides and some sun early and late) that the mortality rate of the seriously I'll dropped from about 40% to about 14%.
Apparently this is pretty well documented and occurred at several different hospitals as un probable as it sounds. Don't know if the same dynamics might exist with the Covid19 virus but I thought it was worth mentioning.
A little fresh air and sunshine if the weather allows. Another one of those things that may help and certainly can't hurt.