Zanzibar Shows Cholera Vaccine Can Protect Even the Unvaccinated, Lancet Infectious Diseases Reveals
9/7/2012 7:52:14 AM
Cholera vaccine gives indirect protection to unvaccinated people in communities where a substantial fraction of the population gets the vaccine, a study in Africa shows. The effect is called "herd immunity." It works because there are fewer bacteria circulating in communities where vaccination levels are relatively high.
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