A 15-month staff review of open-source scientific literature, expert interviews (several dozen), and prior reports, concluding COVID-19 “most likely emerged from a research-related incident,” citing the furin cleavage site, the restriction-site/synthetic-fingerprint argument, the absence of a confirmed intermediate host or ancestral virus, and gaps in China’s data-sharing. Explicitly framed by its authors as an interim, non-final report, ahead of the fuller “Muddy Waters” report six months later (companion node).
relevance_note: The first fully public congressional staff document to conclude lab-origin as most likely; direct predecessor and shorter companion to Muddy Waters.