A girl waits for a helicopter to take off in the town of Koidu
A girl waits for a helicopter to take off in the town of Koidu, Kono district in Eastern Sierra Leone December 18, 2014.
Sierra Leone, neighbouring Guinea and Liberia are at the heart of the world's worst recorded outbreak of Ebola. Rates of infection are rising fastest in Sierra Leone, which now accounts for more than half of the 18,603 confirmed cases of the virus. The overall death toll from the epidemic has risen to 6,915 as of Dec. 14, the WHO said on Wednesday, adding that the increase in cases in Sierra Leone appeared to have slowed. REUTERS/Baz Ratner (SIERRA LEONE - Tags: HEALTH DISASTER)