"The coming few days will be critical in determining the trajectory of the outbreak," the WHO says.
In Butembo, a test on a sperm sample found the virus in a man who fled to the city after he got sick in Ituri province.
The case is in a village in Masereka health zone not far from the large city of Butembo.
According to an outbreak update from the Democratic Republic of the Congo (DRC), officials recorded three more confirmed cases of Ebola yesterday, including one in a patient who died in Butembo, a major city in North Kivu province.
An Ebola-infected patient died in Butembo, a city of nearly 1 million people.
Officials confirmed 5 cases in recent days, bringing the outbreak total to 121.
One more case has been confirmed in the Democratic Republic of the Congo's (DRC's) latest Ebola outbreak, in a patient from Beni, the health ministry said yesterday in its latest update.
Goma is the capital of North Kivu province, near the border with Rwanda.
Cases are at 112 (84 confirmed); officials are also tracking 18 suspected cases.
Also, 3 experts assert that pregnant and lactating women should get the vaccine.
