I read an article the other day about a woman who had it and she described her course while battling it. It just started out as cold symptoms with some sniffles, little sore throat. Who knows how long she had it before that point. Could have been a host for a week. Who knows. Anyway, shortly after that a fever and severe headache started with a cough. She battled that for a couple days then started to feel better and thought getting over it. That is when the SOB and lung problems started getting severe and she was SOB (prob pneumonia). So, her symptoms pretty much went away but she was battling severe resp distress. Most will pull out of this but this is where the demise is with those individuals with underlying health problems.
Read another story about a local DJ who was just recently Dx'ed with it. He said he couldn't finish sentences without stopping to because SOB (short of breath). I will try to find that story and post.
https://starentertainment12.com/public-announcement/
So I wonder if the people who end up completely fine just never have the 2nd wave hit. Sounds like that might be the case.