[dkonofalski]

There is. The OP even talks about a study done during one of the worst outbreaks of delta and the significant effect it had in Missouri. The same type of change in multiple cities where the treatment (mandate) was in effect occurring while also not happening in the other places where it wasn't in effect? That's not a coincidence anymore.

[stakkur]

For Missouri's study to be valid, statistically and empirically, you'd have to measure the actual wearing of masks in areas with mandates, and control for other factors. Did the Missouri study measure actual mask use, and control for other factors?