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In this Feb. 23, 2017, file photo, Shi Zhengli works with other researchers in a lab at the Wuhan Institute of Virology in Wuhan in central China's Hubei province. A 10-member team of international researchers from the World Health Organization hopes to find clues as to the origin of the coronavirus pandemic in the central Chinese city of Wuhan where the virus was first detected in late 2019. (Chinatopix via AP, File)

In this Feb. 23, 2017, file photo, Shi Zhengli works with other researchers in a lab at the Wuhan Institute of Virology in Wuhan in central China's Hubei province. A 10-member team of international researchers from the World Health Organization hopes to find clues as to the origin of the coronavirus pandemic in the central Chinese city of Wuhan where the virus was first detected in late 2019. (Chinatopix via AP, File)

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