Rapid and strict incoming travel restrictions were a key part of "taking it seriously from the very start" with a big impact on future outcome. There are all k

Rapid and strict incoming travel restrictions were a key part of "taking it seriously from the very start" with a big impact on future outcome. There are all kinds of effective measures (e.g. contact tracing, quarantining of unconfirmed suspect cases) that work when you have 20 cases a day and don't work when you have 2000 cases a day, so going all-in while you still have just a few cases works, because by the time you have many cases, it's too late.