brian_dromey
That's absolutely not what the paper is saying, to reiterate, the wearing of a mask will not stop you catching COVID 19, mask wearing is to catch expelled aerosol spray to prevent you spreading it to anyone else. This has been made clear time and time again, and the benefit attached, the supporting number to go alongside that assertion is unclear and IMHO marginal. It's intentionally vague.
And to reiterate, to suggest that wearing a mask reduces the chances of catching COVID by 60-90% is flat out wrong, that's cleverly implied, but that's not actually what they say. One for JetBlast before we go wildly off topic?