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Is America nearing herd immunity with COVID-19? That’s what one scientist believes.

Data scientist Mark Last, a professor at Ben-Gurion University of the Negev in Israel, says that New York and California may have already achieved herd immunity, in which enough people have developed immunity that the risk of further community transmission is either eliminated or significantly reduced. Some estimates say that can occur when 60% of the population have been infected, but one recent study said that number may actually be just 43%.

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