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WHO: COVID origins unclear but lab leak theory needs study

FILE - Marion Koopmans, right, and Peter Ben Embarek, center, of the World Health Organization team say farewell to their Chinese counterpart Liang Wannian, left, after a WHO-China Joint Study Press Conference at the end of the WHO mission in Wuhan, China on Feb. 9, 2021. Experts drafted by the World Health Organization to help investigate the origins of the coronavirus pandemic say further research is needed to determine how COVID-19 first began. They say they need a more detailed analysis of the possibility it was a laboratory accident. (AP Photo/Ng Han Guan, File) FILE - A worker in protectively overalls and carrying disinfecting equipment walks outside the Wuhan Central Hospital, China on Feb. 6, 2021. Experts drafted by the World Health Organization to help investigate the origins of the coronavirus pandemic say further research is needed to determine how COVID-19 first began. They say they need a more detailed analysis of the possibility it was a laboratory accident. (AP Photo/Ng Han Guan, File)