There’s been quite a few of these studies, all with similar results. What’s unfortunate is that the remarkable “penetration” of the idea that cloth and standard surgical masks provided “adequate” (by any measure) protection was so great and peddled by such influential persons that there are now those who, despite plain empirical evidence, still maintain masks provide some material amount of benefit.

I wonder at what point such people will began to consider the evidence in earnest, regardless of the fact that most of these mandates have thankfully been repealed.