It is the ninth Ebola outbreak in Democratic Republic of Congo in four decades. Dozens of people have died in the past two weeks. An experimental vaccine campaign began on Monday in a bid to contain the virus.
But it is already spread to Mbandaka city, a major transport hub on the River Congo. And there are fears it could reach the capital Kinshasa before crossing the border. Nine countries have been put on alert.
Presenter: Elizabeth Puranam
Sterghio Moschos, molecular biologist and a geneticist at Northumbria University
Hakon Bolkan, researcher at the Norwegian University of Science and Technology
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