MONROVIA, LIBERIA - AUGUST 15:  Ibrahim Fambulle, barely able to stand, tries to walk to a different isolation room in an Ebola ward on August 15, 2014 in Monrovia, Liberia. People suspected of contracting the Ebola virus are being sent by Liberian health workers to the center, a closed primary school originally built by USAID. The Ebola epidemic has killed more than 1,000 people in four West African countries.  (Photo by John Moore/Getty Images)