This virus is particularly insidious because it has a long, asymptomatic incubation period during at least part of which it is contagious. So by the time many c

This virus is particularly insidious because it has a long, asymptomatic incubation period during at least part of which it is contagious. So by the time many cases are being detected and reporting it's usually too late, the virus has already spread past containment. There's a video floating around which geographically shows cases in Korea over time. The first two weeks or so a couple cases pop up here and there - the third week sees half the country light up in a matter of days.