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Herd Immunity Appears Unlikely for COVID-19, But CDC Says Vaccinated People Can Ditch Masks in Most Settings

By: William Petri, University of Virginia When COVID-19 first began spreading, public health and medical experts began talking about the need for the U.S. to reach herd immunity to stop the coronavirus from spreading. Experts have estimated that between 60% and 90% of people in the U.S. would need to be vaccinated for that to […]