Researcher Explains Ebola Trial's Success

The head of the scientific group that designed and oversaw the field test in Guinea says international collaboration and community involvement were key to the successful trial of a new Ebola vaccine. In a break with traditional research methods, the team working on the Ebola vaccine did not use placebos on a control group. Instead they devised a "ring approach," administering vaccine to everyone in small groups considered most at risk of contracting the virus. Results were...

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