In peer-reviewed science, where people were actually tested in a real world environment, the masks did not work in practice. This was before it became a political issue, so it did not have a political push into a certain direction as is far too often in science.

I expected it to show it at least some positive results, since it should work in theory. But in practice it gives negative results.
This is probably due to the touching of the face and such. Washing hands seem to work.

At this stage, in many states, the covid-19 has reached herd-immunity. You can see that in the tests and deaths. Nobody dies any more in some places (unless by traffic accidents, etc). Sadly we can not test it, because anti-bodies disappear after 3 weeks. And these tests were already very unreliable.

Good news: With the latest Who? data we also know that people who had the infection do not spread it any more. The basis of herd-immunity. The virus can only spread during the beginning, and people with a good immune system do not spread it at all. I expect the billion dollar vaccine industry to take measures against that. They still need their covid profit.