Does anyone have a list of the common “underlying problems”?
My wild guess is going to be asthma. A lot of the cases I’ve read about result in people dying from a secondary respiratory condition like pneumonia. So, it’s possible that some of the “healthy” people have undiagnosed asthma, allergies, or other conditions which predispose them to bad respiratory crap.
All it takes is a common cold for me to end up with bronchitis or pneumonia. After years of dealing this, my doctor diagnosed me with asthma and put me on a maintenance steroid and a rescue inhaler. No respiratory issues since. And I’m amazed at how much better I can breathe in general — I had no idea how bad it was until I found out how good it can be the asthma is under control(if that makes sense).