Long Quest for Ebola Vaccine Slowed by Science, Ethics, Politics

Image: An experimental Ebola vaccine has been developed by the U.S. National Institutes of Health and pharmaceutical company GlaxoSmithKline. Photograph by Steve Parsons, AP

news.nationalgeographic.com - October 14th, 2014 - Karen Weintraub

Ebola vaccines are so effective in monkeys that macaques can be protected or rescued even if they're injected with a hundred times the lethal dose of the Ebola virus after vaccination. But no one knows for certain whether the vaccines will work in humans; the vaccines haven't yet been rigorously tested in people.

Just developing the vaccines to test in monkeys was a grueling, decades-long process that has killed scores of macaques since the 1990s.

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