When Could the United States Reach Herd Immunity? It’s Complicated.See how vaccines, distancing measures and the rise of coronavirus variants affect projections for herd immunity and when we might reach it.By Matthew Conlen and Charlie Smart

When Could the United States Reach Herd Immunity? It’s Complicated.See how vaccines, distancing measures and the rise of coronavirus variants affect projections for herd immunity and when we might reach it.By Matthew Conlen and Charlie Smart

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