Originally Posted By DJB
You're asking the right questions. Why are cloth masks being required nearly everywhere now when we know they are ineffective?

https://www.cidrap.umn.edu/news-perspect...ased-sound-data



Just two comments on the above link: 1. In today's world 6-week old articles aren't state-of-the-art.
2. The article was posted on Apr 1.