Sam Weiss Evans

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In February 2021, a World Health Organization team investigating the origins of COVID-19 visited the Wuhan Institute of Virology in Wuhan, China. Hector Retamal/AFP via Getty Images

Why gain‑of‑function research matters

David Gillum, Arizona State University; Rebecca Moritz, Colorado State University; Megan J. Palmer, Stanford University, and Sam Weiss Evans, Harvard Kennedy School

The research community is taking a closer look at the lab-leak hypothesis for the origin of COVID-19, prompting discussion about the risks and benefits of engineering viruses.

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