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Nancy Writebol and Kent Brantly
Nancy Writebol and Kent Brantly

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    Officials: Deadliest Ebola outbreak ever

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Officials: Deadliest Ebola outbreak ever

Two American aid worker in Liberia have tested positive for Ebola. CNN's Elizabeth Cohen reports.

Officials: Deadliest Ebola outbreak ever

Two American aid worker in Liberia have tested positive for Ebola. CNN's Elizabeth Cohen reports.