More Than Ebola

The United States' latest brush with Ebola shows that, more than ever, diseases are global travelers.

A physician died at a Nebraska hospital on Monday after contracting the disease in Sierra Leone, where he was working. A New York physician came down with Ebola last month after working in West Africa, sparking quarantines for returning health workers in some states. Earlier in October, a man died in Dallas after becoming infected in Liberia.

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