Japan kept doing it after Spanish Flu. Unfortunately, given that 1910s America and 2020s America both had significant (and in my mind, unwarranted) resistance

Japan kept doing it after Spanish Flu. Unfortunately, given that 1910s America and 2020s America both had significant (and in my mind, unwarranted) resistance to wearing face masks; I would not be surprised if "wear a mask if you feel sick" fails to make it into common understanding in America a second time.