Zanzibar Shows Cholera Vaccine Can Protect Even the Unvaccinated, Lancet Infectious Diseases Reveals
Published: Sep 07, 2012
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.