They have masks for everyone? We are doomed...South Korean Model
I have a relative in Daegu, so I've heard much of this in small personal reports, but this captures the broader picture.
Everyone wearing masks was important - to prevent the spread by the asymptomatic and the ill, even though the utility of use by the healthy is suspect. It also reduces public shaming of those wearing masks, if everyone else is. The ol' Scarlet A trick reversed. :yup: