There is a point beyond which issuing a travel ban makes not a lot of difference. We may have passed that point already.
This is an exponential disease, the time to quarantine is early on.
Don’t agree. The analogy that Osterholm is using is of sparks flying in and landing. I think a huge outbreak from one such spark is unlikely, but many small outbreaks from many “sparks” all over the map is very likely, so stop the sparks from landing.