The United States plans to put 80% of countries on the travel ban list. What do you think of the United States’ approach?

I agree with the approach of the United States. After all, the current epidemic situation in the United States is serious. If Americans continue to go abroad in an endless stream, it will inevitably bring a severe test to global epidemic prevention and control. If we want to comprehensively control the further spread of the epidemic, how to implement an enforceable ban in the country is fundamental.