Yesterday, I asked a question here Why is there a contrast between facemask use in 1918 Flu and the COVID-19? [closed]. I am just curious about why there is a change of attitude. Several people became excited. Similar curiosity exists in the western world, but in a reversed way, why do Asian people wear masks, e.g., this post without a reply Surgical masks - do they prevent the spread of disease?
In order to make my question more acceptable, I changed the subject. At least we can discuss three aspects. According to this report by CNN, that change do exist.
That change do exist. True?
If true, why is there a change?
Could face masks prevent droplets at least?
BTW, personally I do not wear a mask when the smog is serious.