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Target R and Wait for the Vaccine

Opening up the economy means allowing more human interaction and hence greater potential for new #COVID19 infections. Two numbers matter for deciding whether this can be done safely any time soon.

CAMBRIDGE – Many countries are now under lockdown to lower the growth rate of COVID-19 cases and deaths. Given the astronomical costs of such efforts to “flatten the curve” of COVID-19 infections, policymakers are under growing pressure to “reopen the economy.” But how can they do so safely?