I had a really bad case of bronchitis back in February - I was convinced it was covid until doctors told me otherwise. Took me until April to get over it, and even now I tend to be more phlegmmy/find it slightly harder to breathe at times. It doesn't help that I'm a fat bastard either.
If I get covid, it's guaranteed I'm fucked. It would likely make that bronchitis seem trivial in comparison.
Me, my aunt, and uncle all had the antibody test, and we all came back positive. I'm 30, non smoker, swim, work out most days, play football, and in good health. It was awful for me.
My aunt is 68, a smoker with angina, but otherwise decent health. Only got barely got ill.
My uncle is 68. A smoker, angina, emphysema, COPD, severe heart problems, and obese. Never even noticed he was ill
We spent the whole time trying to shield my uncle, assuming that if he caught it, he would automatically die.
The illness is pretty random.