No, but definitely the time to enact common sense, and if anybody says, "but that's offensive to..." give them a good punch in the mouth. Good common sense, like not allowing people to fly from those countries.
Except that if you cancel all the flights, medical personnel and drugs and equipment have no way to get there. Which means that the disease can't be contained. Which means that it spread to places that there are still flights allowed, before you are aware of it, or have countermeasures. What do you do then? Cut off all flights to that country, rinse and repeat?
The people who actually do disease control are warning, based on science, that the douchebag reactionary approach to this is going to kill hundreds of thousands, perhaps millions of people, and put even First World countries at risk. Sorry, America isn't going to shoot its way out of this one.