Expert Says Ebola Vaccine Development Takes Time

As early as 2003, researchers at the U.S. National Institutes of Health knew what made the Ebola virus tick, and animal experiments of candidate vaccines showed promise.    The problem, according to infectious-disease specialist William Schaffner of Tennessee's Vanderbilt University School of Medicine, was a lack of funds to begin human clinical trials.   “Once you have the candidates, if you think they are going to work - for example, you’ve put them into a...

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