While Ebola is a serious disease, and something not to be taken lightly if there are reports of it in your area, I disagree with the idea of cutting off air traffic; to me that's like putting out a grease fire with a bucket of water, you might just make the problem worse.
Think about it, there's plenty of other modern countries out there aside from America. If people who try to go America to treat their infection are denied, they'll probably just go elsewhere. Britain, France, you name it. Or they may even go to a slightly better but still ****** country such as Russia (legitimately or not). Imagine what would happen if there was an outbreak there? Or even worse, they could use a 'backdoor' to get into the US or other modern countries such as through Mexico or down from Canada. Then you've got a bunch of people entering the country who may have Ebola that wouldn't even be on record! Most of these people would be disappearing into the poorer parts of the country, crowded cities and suburban ***** where the infection could spread much easier.
Scary stuff. Still, since I live far away from Texas, I'm much more worried about getting my guts mangled on the road than by a relatively rare virus.
Edit: Oh, but don't let me get in the way of a good scare right before Halloween. If you really want a medical horror story, here ya go:
http://en.wikipedia.org/wiki/Influenza It's basically the Terminator of lethal diseases: constantly evolving, morphing, and adapting in its bid to destroy the human race.
2spooky4immunity