I keep thinking about something @shoffmania said in particular... there are something like 200 events that could go pandemic each year. How do you pick which ones to shut down for? Will the public accept inevitable "overreaction"?
For travel restrictions to work, you need to do them before community transmission...

This also means it is harder for countries with big travel hubs to act quickly enough. But again, they're most useful when they most seem like overkill.
So it's an interesting and nuanced issue -- tough to get right. But there's lots we can learn from Covid and the responses in countries like Vietnam. Read @germanrlopez and @dylanlscott on lessons from South Korea and Germany too: https://www.vox.com/22381700/pandemic-playbook
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