House Republicans on the subcommittee probing the origin of the Covid-19 virus appear to have inadvertently released a trove of new documents related to their investigation that shed light on deliberations among the scientists who drafted a key paper in February and March of 2020. The paper, published in Nature Medicine on March 17, 2020, was titled "The Proximal Origin of SARS-CoV-2" and played a leading role in creating a public impression of a scientific consensus that the virus had emerged naturally in a Chinese "wet market." The paper was the subject of a hearing on Capitol Hill on Tuesday, which coincided with the release of a report by the subcommittee devoted to the "Proximal Origin" paper. The scientists believed one thing in private " that lab escape was likely " while working to produce a paper saying the opposite in public. Much of Tuesday's hearing focused on a critical few days in early February 2020, beginning with a conference call February 1 that included the eventual authors of the paper and Drs. Anthony Fauci, then head of the National Institute of Allergy and Infectious Diseases, and Francis Collins, then head of its parent agency, the National Institutes of Health. Later minutes showed that the consensus among the experts leaned toward a lab escape. Yet within days, they were circulating a draft " including to Fauci and Collins " that came to the opposite conclusion, the first draft of which had been finished the same day of the conference call.