Viruses don't care about abstract lines on a map. But viruses are slowed by borders that are physically enforced. Big difference.https://twitter.com/sapinker/status/1234147029435244544 …
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For a virus like this, even tight borders leak, at this stage the virus would be coming from all directions. Once it's in exponential secondary infection kicks in, I don't think border control can do much at this point
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