Ebola Vaccines: Why Clinical Trials Are Just the First Step

Even now, with more than 5,000 people dead and 14,000 confirmed cases of Ebola in eight countries, it is still not clear who will pay if, or when, a vaccine becomes available. Millions of doses will be needed, and not just to help end the current epidemic but also, crucially, as a stockpile to prevent future outbreaks from getting out of control.

Photo: Gavi/Atul Loke