Flawed study used to claim COVID-19 lockdowns are ineffective

Social media accounts in Canada and the U.S. are promoting a Johns Hopkins meta-analysis of COVID-19 lockdown strategies that found that lockdowns have “little to no public health effects.” The study has not undergone peer review, and its authors are economists, not public health or epidemiology experts. The study uses a sweeping definition of “lockdown” that includes any COVID-19 safety measure other than vaccination, including masking and social distancing policies. The study also excluded from its analysis all studies that examined the impact of COVID-19 safety measures on disease transmission and hospitalization rates, focusing instead on mortality.

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The Public Health Communications Collaborative (PHCC) was formed in 2020 to coordinate and amplify public health messaging on COVID-19 and increase Americans’ confidence in guidance from the Centers for Disease Control and Prevention (CDC) and state and local public health officials.

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