TOPSHOTS A picture taken on August 25, 2014 in Monrovia shows nurses wearing a protective suit escorting a man infected with the Ebola virus to a hospital in Monrovia. The United Nations vowed on August 23 to play a "strong role" in helping Liberia and its neighbours fight a deadly outbreak of Ebola in west Africa, which it said could take months to bring it under control. Liberia has been particularly hard hit by the epidemic that has swept relentlessly across the region since March, accounting for almost half of the 1,427 deaths. AFP PHOTO / ZOOM DOSSO