Scientists at Oxford University are developing a new vaccine that could be ready for clinical trials within two to three months to help tackle the Ebola emergency. The outbreak, centred on DR Congo, has resulted in 750 suspected cases and 177 deaths.

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The rare species of Ebola, known as Bundibugyo, for which there is no proven vaccine, kills around a third of those infected.

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There are no guarantees the vaccine will prove effective and it will take animal research and trials on people to know if it will be. But scientists say they are working urgently in case the outbreak spirals and their experimental vaccine is needed.

The risk from the current Ebola outbreak has now been upgraded from "high" to "very high" in the Democratic Republic of Congo, by the World Health Organization (WHO).

Read more on the BBC.