Anecdotally I am a 30 year old male who is usually only ill for about a day or 2 every year. I had COVID for a couple of days and then a week later after recovery a started getting this super-dry cough. This stayed with me for 2 months, first of which was so bad I could barely sleep until I got a codeine-based cough syrup.

On the other hand I was also considering what our politicians did to the society keeping them locked up in their rooms and not training their immune systems on a regular basis which usually happens with normal interaction.