> > that hardly means that it is 100% ineffective otherwise >It may not be 100% ineffective for a single event, it needs to be effective over the entire period

> > that hardly means that it is 100% ineffective otherwise >It may not be 100% ineffective for a single event, it needs to be effective over the entire period of use. Point 1, yes, sick people should wear masks. This is already known. Most people aren't sick. I don't see the logical reasoning behind why it has to be effective over the entire period of use. The whole rational behind curve flattening is that we do as much as possible to reduce transmission. So being partially effective will still reduce the number of transmission and the chances of transmission. Plus by normalizing mask usage more sick people will be encouraged to use masks because it is socially acceptable. A lot of people don't use masks even if they are sick because 1) lack of testing to confirm coronavirus and 2) embarrassment over using a mask because it is weird. It's easy for someone to decide to wear a mask or quarantine if they know they have Covid-19, but if they are just sick or mildly sick, or even asymptomatic, the decision to wear a mask or quarantine is much harder because they have to balance their other needs with the chances that they may just have the common cold. > If you've worn one or watched people on the train in Japan or across Asia you'll know this isn't true at all. People are forever readjusting it. Seeing as how there is a physical barrier over your mouth I don't see how you cannot use common sense to see that it is true. Not to mention my cited research study uses it as a potential reason why the masks were shown to be effective. > They wear them for many reasons, and they're people so they're just as selfish as Americans or anyone else, and that's certainly my experience. I guess this is a matter of opinion, so I can't really argue that you don't believe it.