Anecdotal evidence suggests that it is fairly common: https://www.reddit.com/r/COVID19positive/ -- 2 of the 5 top posts from today are from people complaining about experiencing this, and are both full of comments personally relating to it. There is obviously going to be a selection bias here, but it seems like a good starting point for estimating a lower bound if you can’t find enough good studies.
Anecdotal evidence suggests that it is fairly common: https://www.reddit.com/r/COVID19positive/ -- 2 of the 5 top posts from today are from people complaining about experiencing this, and are both full of comments personally relating to it. There is obviously going to be a selection bias here, but it seems like a good starting point for estimating a lower bound if you can’t find enough good studies.