Coloured transmission electron micro graph of a single Ebola virus, the cause of Ebola fever
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Porton Down at front line of UK's Ebola prevention efforts

13 August 2014 Last updated at 20:04 BST

The BBC has been given exclusive access to the Porton Down research centre in Wiltshire where scientists are carrying out tests on the Ebola virus.

Researchers there are working on detecting and minimising the risk of the virus appearing in the UK.

Meanwhile, the World Health Organisation said the number of people killed by Ebola in West Africa had now risen to 1,069.

Hugh Pym reports.