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Another American infected with Ebola

Ebola has infected more than 24,000 people in West Africa and killed 10,000 or more of them.

A healthcare worker at an Ebola treatment center outside Freetown, Sierra Leone on Dec. 22, 2014.
A healthcare worker at an Ebola treatment center outside Freetown, Sierra Leone on Dec. 22, 2014.REUTERS

Maggie Fox