UPDATE 1-Signs that Ebola "may be levelling off" in Sierra Leone - WHO
* Sierra Leone still records 248 new cases in past week
* More than 8,000 killed worldwide in epidemic to date
* WHO to host meeting on experimental vaccines on Thursday (adds details, byline)
By Stephanie Nebehay
GENEVA, Jan 7 (Reuters) - Sierra Leone, the country worst affected by Ebola, reported nearly 250 new confirmed cases in the past week but the spread of the virus there may be slowing, the World Health Organization (WHO) said on Wednesday.
The epidemic has taken 8,235 lives out of 20,747 known cases worldwide over the past year, it said.
The WHO's weekly report was based on figures reported by authorities in nine countries. Guinea, Liberia and Sierra Leone account for the majority of infections and fatalities.
"There are signs that case incidence may have levelled off in Sierra Leone, although with 248 new confirmed cases reported in the week to 4 January 2015, it remains by far the worst-affected country at present," the WHO said.
Cases are still under-reported and unevenly spread in West Africa. The virus is spreading most rapidly in western Sierra Leone, where the capital Freetown reported 93 of the new confirmed cases, the WHO said. Continuación...