PortisheadBiscuit : I think what John2290 is trying to say is just that out of all the co-factors that decide if you live or die, if you get this, and end up on a respirator. The biggest one, appears to be weight (BMI). Dr Combell did a video about it, where he talked about co-factors.
In a danish newspapir (online), there was a health guy, advocateing that danes should spend the next few weeks doing training excersizes that helped build lunge capacity, and stronger respiratory muscles (so your system, has it easier, when breathing). I kid you not, there was this video of the guy showing 3 easy excersizes that could help. How many actually decide to do something like that? probably very few I suspect. He said he trained atheletes, and those divers that need to hold their breaths and such.