The World Health Organization has called an emergency meeting to discuss the risk of Ebola spreading internationally from the Democratic Republic of the Congo.

This comes after a new Ebola case was discovered in Mbandaka, a city of more than a million people, which has sparked fears of it spreading downstream to the capital Kinshasa or to other countries.

The WHO is preparing to distribute an experimental vaccine which needs to be stored at extremely low temperatures – something that will prove to be a major challenge in areas with an unreliable electricity supply.

This is the ninth outbreak to hit the DR Congo since the disease was identified and named after a local river more than 40 years ago.