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Experts warn about the 'brutal arithmetic' of applying herd immunity to humans

Breaking News EmailsGet breaking news alerts and special reports. The news and stories that matter, delivered weekday mornings.SUBSCRIBEMay 14, 2020, 9:57 PM UTCBy Denise ChowDr. Mike Ryan, the World Health Organization's emergencies director, offered some stern words Wednesday about hopes that herd immunity could stymie the coronavirus."Humans are not herds," he said.Herd immunity has emerged in recent weeks as a popular talking point among people who argue that coronavirus lockdowns have been too stringent.Herd immunity is a concept in epidemiology that describes how people can collectively stave off infections if some percentage of the population has immunity to a disease.But herd immunity in relation to the coronavirus is far from a rea ...
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