summary - Case-geolocation analysis of the Huanan market’s role in the pandemic’s start. Assembled case-location data for the ~155 Dec-2019 COVID-19 cases lacking a known epidemiological link to each other (combining the original WHO-mission data with additional geolocations obtained via other channels, since Chinese authorities did not release a full raw line list — see this slice’s other nodes on data access), plus the market’s own SARS-CoV-2-positive environmental swab locations. Finds both the human cases and the positive swabs are spatially centered on, and significantly closer to, the Huanan market than chance would predict, with the highest swab-positivity concentrated in the section selling live mammals. Concludes the market was the pandemic’s “early epicenter” while explicitly stating there is “insufficient evidence to define upstream events” (i.e., it does not itself identify an infected animal or a supply chain).
relevance_note - The single most-cited primary case-geolocation analysis anchoring the market-centric zoonosis case; its compiled case-location dataset is itself reused across the later literature (flag for step 2’s data-basis linking) rather than being independently re-derived each time.