A worker stands next to a cage of mice inside a laboratory of the Wuhan Institute of Virology in Wuhan, China, on Feb. 23, 2017. JOHANNES EISELE/AFP via Getty ImagesSecurity personnel stand guard outside the Wuhan Institute of Virology in Wuhan, China, during a visit by members of the World Health Organization team investigating the origins of COVID-19 on Feb. 3. (Source: HECTOR RETAMAL/AFP via Getty Images)
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