WHO says there have been No new Ebola cases in Liberia for more than two weeks #WinningTheFight

No new case of the deadly Ebola virus has been registered in Liberia since February 19, the World Health Organization said Wednesday, also hailing positive signs in Sierra Leone and Guinea.

Liberia, long the hardest-hit country in the Ebola epidemic that has killed nearly 10,000 people in west Africa, "has now gone well over two weeks without a new reported case," said Bruce Aylward, who heads WHO's Ebola response.

Since the outbreak began in December, 2013, 24,282 people in nine countries have been infected with the virus, and 9,976 of them have died, according to the latest figures.

All but 15 of those deaths have happened in the three west African countries ravaged by the outbreak.

But the tide seems to have turned in Liberia, which six months ago was reporting more than 300 new cases each week and which still counts the most deaths in the outbreak, at 4,162.

The country last week discharged its last confirmed Ebola patient, who tested negative for the virus for the second time on March 3, Aylward told reporters in Geneva.

That means the country started its 42-day, or two incubation-period, countdown towards being considered Ebola free on March 4.

The outlook was less positive in the other countries affected by the outbreak, Guinea and Sierra Leone, although Aylward highlighted positive signs there too.

In Sierra Leone, which counts the most cases of the virus at 11,619, only 58 new confirmed cases were registered last week -- the lowest number since last June, he said.

"It's going in the right direction," Aylward said.

And in the forest region of Guinea where the outbreak began 15 months ago, no new cases have been reported in the last 10 days, he pointed out.

There is "evidence now that Ebola can be stopped," Aylward said, insisting: "this can be done."

He warned though that if international attention, determination and funding to halt the outbreak wanes, "there is a huge risk of failing to do so."

Continued resistance within communities in Sierra Leone and Guinea to measures taken to rein in the outbreak is also threatening the progress.

In both countries some Ebola patients are still not being isolated and treated, while some unsafe burials of the highly contagious bodies are still going on.

Aylward said that it should be possible to halt transmission of the virus completely by the middle of the year, but acknowledged that if community resistance continues "it's a bit of a crapshoot in terms of when transmission will actually stop."