Scientists have examined cases of patients hospitalized before the call went out for doctors to look for ties to the market. But apart from the politics, experts say that understanding what caused a public health crisis that has killed nearly 7 million people could help researchers understand how to prevent the next one.Īlso in Explained | Third patient is cured of HIV: How did this happen and what are its implications? What have scientists done to investigate?Įxperts have tried to work around the holes in the data. The Energy Department’s findings have given a boost to House Republicans, who are investigating the pandemic’s origins. Many Democrats have not been persuaded by the lab leak hypothesis some say they believe the explanation of natural causes, and others say there may never be enough intelligence to draw a conclusion. The lab leak theory gained currency among Republicans in the spring of 2020 after former President Donald Trump, who used inflammatory terms to blame China for the pandemic, latched onto the idea. Lab accidents do happen in 2014, after accidents involving bird flu and anthrax, the Centers for Disease Control and Prevention tightened its biosafety practices. But other scientists say there is evidence, albeit circumstantial, that the virus came from a lab, possibly the Wuhan Institute of Virology, which had deep expertise in researching coronaviruses.
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