I think you also need to consider direction of spread. It is easy to see how spread from an individual is cut with masks. Spread to the individual is almost c

I think you also need to consider direction of spread. It is easy to see how spread from an individual is cut with masks. Spread to the individual is almost certainly affected, but to really cut it down, you almost certainly need gloves and a ton of hand washing going on. But, again, I am /not/ arguing against masks. I fully agree that if you are sick, stay home and wear a mask when you do go out. My point is that much of the reduction is more easily explained with "stay home" than it was "a lot of folks were wearing masks." I further agree that both had an likely had an impact. But, just as having a more streamlined car will give you better gas mileage, if you are trying to make a bigger impact, you are almost certainly better focusing on buses than you are personal vehicles.