I doubt that even China has the resources and capability to do that fully, and I think you know what they are capable of doing in terms of rounding up millions of people..

And in the US, it seems like a lot of adults go to work when sick, even as the reasonable infection control measure may be to not go to work when having some flu symptoms; and this American pattern is probably still more of a public health vulnerability than this mutant coronavirus.

Unless and until the CBP and CDC demand to see that all returning Americans and foreign visitors are vaccinated in at least the way public school-going children are required to be vaccinated to stay in public schools in “tough areas”, there should be questions about how CBP and CDC behave with regard to people at US ports of entry, since this is about more than just Wuhan coronavirus, SARS, MERS, or even Ebola.