Did you actually look at any part of the paper? Their approach is not some hand-wavy qualitative measure. They are measuring an actual phenomenon in people with known COVID infections. If you have a methodological problem with the paper, try using facts next time.
No didn’t read the paper. Yes it’s it’s extremely hand wavy of measurement. You can’t develop a methodology to determine if you have a chronic disease in less time then a a disease can be discovered are determined to be chronic. Duh.
