Volunteers lower a corpse, which is prepared with safe burial practices to ensure it does not pose a health risk to others and stop the chain of person-to-person transmission of Ebola, into a grave in Kailahun July 18, 2014. Jasarevic/Handout via Reuters
'More than 40 percent of the total number of cases have occurred within the past 21 days. However, most cases are concentrated in only a few localities,' the United Nations health agency said in a statement ahead of launching its new strategic plan for tackling the world's worst Ebola outbreak.
A separate Ebola outbreak in the Democratic Republic of Congo, identified as a different strain of the virus, is not included in the latest figures which cover Guinea, Liberia, Sierra Leone and Nigeria, it said.
(Reporting by Stephanie Nebehay; Editing by Toby Chopra)
