70% to 85%

CNN: “At the current pace of about 2 million shots per day — the latest seven-day average of doses administered reported by the US Centers for Disease Control and Prevention — the US could reach herd immunity by summer through vaccinations alone. It will likely be even sooner, if factoring in individuals who may have some natural immunity due to prior infection. … Herd immunity thresholds for Covid-19 are only estimates at this point. But experts generally agree that somewhere between 70% and 85% of the population must be protected to suppress the spread.”

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