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(FILES) In this file photo taken on May 27, 2020 the P4 laboratory (centre L) on the campus of the Wuhan Institute of Virology is pictured in Wuhan in China's central Hubei province. - President Joe Biden on March 20, 2023, signed into law a bill requiring the release of intelligence materials on potential links between the outbreak of the Covid pandemic and a laboratory in the Chinese city of Wuhan. (Photo by Hector RETAMAL / AFP) (KEYSTONE/AFP/HECTOR RETAMAL)