You can't. That's why no one from SARS countries should be allowed in until they have this under control in their own country.
it's not like our government has the power to quarantine people while they are in another country...
But they do have the power to revoke Visas into our country.
But they won't do that. But why not? Because there's big money at stake. Surely we can't alienate foreigners we depend on for our global economy. Money talks, right?
But that's fine. We'll still let them in, and when they get Americans sick, we'll just quarantine them. After all, its just the rights of Americans at stake and foreigners and their money are so much more important than that.
Isn't globalism great?
Not saying I agree or disagree. But there is HUGE money at stake if people stop shopping, working, going to school, flying etc.
It's got to be a tough call for the powers that be. Either way there will be economic impact but strict measures taken now will prevent HUGE loses later. Having said that, I predict the usual course of short sightedness and short term thinking-nothing of any consequence will be done until it's too late. The corporate world only thinks as far ahead as the next release of earnings numbers.