Earlier quoted context omitted.
I've read repeatedly (and heard on the radio several times) that wearing a mask if YOU are infected will help protect other people, but if you are not infected then it has no known protective effect ie. is not thought to be any more protective than not wearing one. Do you have any evidence to back up you talk of masks? (And if YOU are infected you should not be out anyway) Edit: I was thinking of non-medical situatio…
"no known protective effect" Right. No one has ever studied contagions among the community at large and the effect of masks. When you hear people say there is no evidence, this is what they are referring. "is not thought to be any more protective than not wearing one" This is taking that claim too far, and is seldom what they're saying. Or rather never what they are saying. Early on there were PDAs that discouraged m…
It's been studied. There has not been a randomized controlled trial because performing one would be extremely unethical.
There is plenty of study evidence to support their use, just nothing meeting the gold standard of a RCT and there never will be one against a true live fire contagious disease.
The irony with all this is that the US administration really want to get people back to work as soon as possible. Massive deployment and mandatory usage would be the safest way to do that the soonest.
Too bad they already foreclosed that option by materially misleading the public.