-Guinea, Liberia and Sierra Leone had 99 new cases for week to January 25
-It's the first time the number has fallen below 100 in a week since late June
The number of new Ebola cases reported in the three worst-hit countries fell to its lowest level since late June, the World Health Organization said Thursday.
Guinea, Liberia and Sierra Leone had a combined total of 99 new cases for the week to January 25, the WHO said.
The total breaks down to 65 in Sierra Leone, 30 in Guinea and four in Liberia.
The number of cases continued to fall in Liberia and Sierra Leone, WHO said, but Guinea's figure rose from 20 confirmed cases in the previous week.
The response to the Ebola epidemic has now moved to a second phase, WHO said "as the focus shifts from slowing transmission to ending the epidemic.
"To achieve this goal as quickly as possible, efforts have moved from rapidly building infrastructure to ensuring that capacity for case finding, case management, safe burials, and community engagement is used as effectively as possible."
By Laura Smith-Spark
CNN's Debra Goldschmidt contributed to this report.