Opinion | What Coronavirus Herd Immunity Really Means - The New York Times

without a vaccine... millions will die...

concept of herd immunity... When enough people are vaccinated, a pathogen cannot spread easily... say each person infects an average of three others... nearly two-thirds ... would need to be immune to confer herd immunity...[but] prior infection has to confer immunity ... that means a lot of deaths...

a rapidly spreading virus doesn’t stop right when herd immunity is attained... uncontrolled ... could continue for months after herd immunity ... infecting ... far above ... herd immunity threshold ... additional infections ... refer to as “overshoot.”...