There have been multiple articles posted in this very thread about masks. (Granted, It's a very long thread.) Regardless, I found some by searching the Internet. It didn't take long. I'll save you some time and just quote myself.
Just to clarify those are preprints, some of the detailed posts on this board are better thought out than one preprint you listed,, it is just making interpretations and guesses based on charts and data. Not saying right or wrong but they are not peer reviewed studies etc.
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