Dr Anthony Fauci
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Dr Anthony Fauci on hopes for an Ebola vaccine

5 August 2014 Last updated at 10:40 BST

One of the world's leading immunologists has told the BBC that he hopes to develop a vaccine for the deadly Ebola virus by the middle to end of 2015.

Dr Anthony Fauci - the Director of the US National Institute of Allergy and Infectious Diseases - said clinical trials would start in September on a vaccine that has shown "promising results" during tests on animals.