I am a lifelong asthmatic.
When I am suffering through an asthma attack, the last thing I want to do is lay on my stomach. I absolutely feel like I am suffocating if I do.
COVID19 patients breath well and have good O2 saturation in that position.
So this is not a mechanism in the lungs like pneumonia, or viral pneumonia.
Very strange indeed.
I don’t have Asthma, but I can not lay on my stomach either. I used to, when I was younger.