LiberiaEbola-0ec08

In this photo taken on Tuesday, Aug. 12, 2014, nurses dealing with patients await the arrival of Liberia President Ellen Johnson Sirleaf, as she tours areas to call on health workers not to leave there post as fear of the Ebola virus spreads throughout the city of Monrovia, Liberia. The World Health Organization declared it is ethical to use untested drugs and vaccines in the ongoing Ebola outbreak in West Africa although the tiny supply of one experimental drug handed out to three people has been depleted and it could be many months until more is available. (Abbas Dulleh/AP)

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