ภาพการต่อสู้กับการระบาดของอีโบล่า

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A medical staff holds a package of an experimental candidate vaccine rVSV-ZEBOV against Ebola virus disease at the University Hospital in Geneva, Switzerland, Oct. 22, 2014.

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In this file photo dated May 21, 2009, President Barack Obama meets with Ron Klain, then chief of staff to the vice president. Klain was recently appointed the U.S. Ebola czar and his post is effective as of Oct. 22, 2014.