Thank you for this explanation. I was already cooking up my own in response to the mask comment when I came up on your comment.
This is what happens when someone half understands something and gets adamant. Unfortunately, most of the thread's arguments stem from half understandings and half truths, such as this.
Yes, you are right. 0.06-1.4um is smaller than 20-30um. But saying that the masks don't stop these droplets at all, is incorrect. If you shot a single COVID droplet through the gaps in the cloth weave, then yes, it would slip right through -- nothin' but net. But a cough or a sneeze or even a simple breath is so much more complicated than that. It's an incredibly turbulent expulsion of gas, and droplets will get caught on the mask fibers. Some droplets will slip through, but cloth masks do a decent job at catching a large amount of them -- N95s and PM2.5 filters do an even better job. Even the source you yourself posted says that a multi-layer cloth mask can catch up to 50-70% of fine droplets and up to 50% of ultrafine droplets, <1um. At that microscopic level, it isn't like a single fish slipping through a gap in a net. At the micron level, each individual cloth fiber looks like giant, snarling seaweed trap and the tiny particles do stick to the fibers when they come in contact -- they do not bounce off. No one ever said that masks completely stop COVID droplets from escaping -- not a single person with a medical degree has ever said this. The entire point is to inhibit the spread, which masks are proven to do. 30%-50% of droplets escaped is markedly better than 100% of them escaping, wouldn't you agree? Masks work when we ALL wear them. Masks are not for personal protection, they're for protection of others.