Dr. Kent Brantly (L) of Samaritan's Purse relief organization is shown in this undated handout photo provided by Samaritan's Purse, wearing personal protective equipment as he cares for Ebola patients... more 
Dr. Kent Brantly (L) of Samaritan's Purse relief organization is shown in this undated handout photo provided by Samaritan's Purse, wearing personal protective equipment as he cares for Ebola patients at the case management center on the campus of ELWA Hospital in Monrovia, Liberia. Brantly, a 33-year-old American doctor working for a relief organisation in Liberia's capital has tested positive for the tropical disease Ebola on July 26, 2014, according to a statement from Samaritan's Purse. REUTERS/Samaritan's Purse/Handout via Reuters (LIBERIA - Tags: HEALTH SCIENCE TECHNOLOGY) ATTENTION EDITORS - FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE WAS PROVIDED BY A THIRD PARTY. REUTERS IS UNABLE TO INDEPENDENTLY VERIFY THE AUTHENTICITY, CONTENT, LOCATION OR DATE OF THIS IMAGE. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS less 
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Reuters | Photo By HANDOUT / REUTERS
Sun, Jul 27, 2014 1:52 PM EDT