No it doesn't. Try reading your sources.
Just kidding. You won't do that.
Uh, I read it. It backs up exactly what he said. Here is an excerpt:
Intervention:
Encouragement to follow social distancing measures for coronavirus disease 2019, plus either no mask recommendation or a recommendation to wear a mask when outside the home among other persons together with a supply of 50 surgical masks and instructions for proper use.
By 50 "surgical masks", lets be charitable and assume they were referring to ASTM level 1, the least effective surgical masks typically worn in that context.
Conclusion:
The recommendation to wear surgical masks to supplement other public health measures did not reduce the SARS-CoV-2 infection rate among wearers by more than 50% in a community with modest infection rates, some degree of social distancing, and uncommon general mask use. The data were compatible with lesser degrees of self-protection.
So, being charitable and presuming the study was done with only ASTM level 1 surgical masks, they were shown to be ineffective.
The ASTM level 1 spec claims to filter particles at .1 micron with >= 95% efficiency.
The SARS-CoV-2 virus is about .1 micron, so if the worst surgical mask doesn't stop it reliably, then using logical inference, what chance do you think cloth face diapers have at stopping infection? Even ASTM level 3 masks only give you about another 4% efficiency.
The only "masks" that work effectively at lowering your chance of SARS-Cov-2 infection are N95 respirators and above, and those cannot be worn over long periods of time without medical consequences like hypercarbia, and so aren't really suitable for the public anyway.
The face diapers that you pseudo-skeptics so maniacally wear are just virtue-signaling devices used to soothe other Covidiots, and demonstrate your compliance to "authorities", and that, is backed up by actual science.