Death toll rises to 4,447
The global body says deaths have risen to 4,447, and there have been 8,914 cases overall. It says total cases are expected to rise above 9,000 by the end of the week. The WHO estimates figures by taking the numbers of confirmed cases and multiplying them to account for under-reporting. It multiplies figures from Guinea by 1.5, from Sierra Leone by 2 and from Liberia by 2.5.