As someone who lives in Poland, I believe that what President Trump is doing is the right approach, but it is a bit late - the virus is already in the USA.
Poland today (12th March) has 31 cases (out of a population 1/10 th that of the USA) and no deaths. The government has also acted late, but has shut down
1. All schools and colleges
2. all cinemas, theatres, operas, museums, night-clubs
3. recommended everyone who can work from home to work from home
The shutting down of flights may reduce the severity and it’s a good thing to do, even now
A politically correct world will literally be the death of us all.