I don't understand what you mean with that link. Says nothing interesting.
The evidence is, in asian countries since december 2019, there is not anything agains't the use of facemask, all in favour. Closely nobody say, close nobody believe that facemask doesn't work agains't virus disease. So they use them massively with concience of it. Not law enforced, example South Korea or Japan. They don't lie with numbers.
Only in western countries, informed by the WHO (his president paid by China) started with this lunatic hoax again't facemasks. And agains't aerosols. When there was already evidence of them in Asia.
Result: Asian countries has better fougth sars-cov2.
Evidence: https://www.ncov2019.live/
This is the truth. Facemask work.
If 99 people of 100 use facemask, and even of it there is an infection (Nobody says that masks are perfect or that they are used properly or that they are the only thing to do).
Surely the majority of those infected were those who wore a mask, and even the one who did not wear it might not be infected, and be immune. There is that possibility, no one denies it. But if no one were wearing masks, the infection would be much bigger and worse.