Since the first cases of a mysterious new respiratory illness were recorded in China in late 2019, scientists have come to know the pathogen named SARS-CoV-2 (along with its Greek-letter variants) with an uncommon intimacy. With astonishing speed, they decoded its genetic architecture and, using that knowledge, created treatments and vaccines that have reduced the pandemic to a background concern in many parts of the world.
,"but by destroying samples, hiding evidence, gagging Chinese scientists and undermining international efforts, Beijing has made a full origins investigation impossible and put the world at risk."It is not entirely clear what led the Energy Department to revise its estimate; the update delivered recently to members of the Biden administration and congressional leaders says agency investigators now have “low confidence” in a lab leak origin for COVID-19.
Four other agencies have expressed"low confidence" in a zoonotic origin, meaning that they believe the coronavirus came from a wildlife market but lack the evidence to make a more definitive declaration.
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