My go to site for COVID-19 info is the CDC. Much less hyperbolic anything else out there.

https://www.cdc.gov/coronavirus/2019-ncov/index.html

This is where the “self quarantine “ for 14 day recommendation for China visitors came from. If that rec became effective for those fling to/from affected US states in a month or two, the airlines would effectively have to shut down due to lack of personnel.

I don’t expect that to happen though.