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Coronavirus vaccines are coming, but how effective will they be, and how widely adopted?

The answers affect progress toward herd immunity—and the end of the pandemic. Click through the four plausible scenarios below to see how much natural immunity would be needed (achieved through exposure and other means) to supplement vaccines of different effectiveness and adoption levels.

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To read the article, see “When will the COVID-19 pandemic end?,” September 21, 2020.