The first large-scale trial of an Ebola vaccine will begin in Guinea at the weekend, said the World Health Organization, weeks after a similar test kicked off in neighbouring Liberia. The Phase III testing of the vaccine -- one of two that are in the most advanced stages of development -- aims to ensure it provides protection against the virus that has killed some 9,800 people in Liberia, Guinea and Sierra Leone. There is no licensed treatment or vaccine ...
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