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If Coronavirus Is Contained in the U.S., Why Are Public Health Officials Worried?

There are more new cases outside China than in, the WHO said Wednesday

Bloomberg business news
Can We Overcome Pandemics?
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Walling off travelers from mainland China to the U.S. is one thing. Walling off the world is far more difficult.

That’s the challenge facing U.S. health authorities who have adopted a policy of aggressive containment to shield Americans from the new coronavirus. The Trump administration has sharply curtailed travel to and from China, barring most non-citizens who’ve been to China in the past two weeks from entering the U.S. and asking returning Americans to isolate themselves in quarantine.