Wuhan lab leak: Why scientists are interested in this Covid origin theory

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The United States is closer than ever to beating Covid-19 , with half the country vaccinated and more restrictions lifting. © Hector Retamal/AFP/Getty Images/FILE Members of the World Health Organization (WHO) team investigating the origins of the Covid-19 coronavirus, wearing protective gear are seen during their visit to the Hubei Center for animal disease control and prevention in Wuhan, China's central Hubei province on February 2, 2021. (Photo by Hector RETAMAL / AFP) (Photo by HECTOR RETAMAL/AFP via Getty Images) But we're as far as ever from knowing how this virus, which shut down the world, came to be --...