trailA Huanan Market-linked vendor with symptom onset around December 11, 2019 was the earliest documented COVID-19 case
COVID-19 cases occurred before the Huanan Market cluster began
Worobey onset-date reanalysis· for
A 41-year-old Wuhan accountant's COVID-19 symptom onset was December 16, 2019; his December 8 illness was an unrelated dental problem
atomic
The first reported COVID-19 patient's actual symptom onset was December 16, 2019, not December 1, 2019
Earlier or unlinked cases and biased detection· against
A peer-reviewed report documented a COVID-19 case with symptom onset on December 1, 2019 and no epidemiological link to the Huanan Seafood Market
atomic
Early COVID-19 case ascertainment was biased toward cases linked to the Huanan market
Early Wuhan COVID-19 case definitions required or emphasized an epidemiological link to the Huanan Seafood Market
claim · empirical · derivedA factual claim that rests on inference from other evidence rather than direct observation.constitution →claim page ↗︎
A Huanan Market-linked vendor with symptom onset around December 11, 2019 was the earliest documented COVID-19 case
⇄ContestedCredible evidence or argument exists on multiple sides.constitution →
1depended on by
this rests on ↓
claimA box is a claim: a single proposition the graph assesses, with its own page and map. Click any claim to centre the map on it.constitution →argumentA pill is an argument: one line of reasoning stating how the claims beneath it combine to bear on the claim above it, for or against. Arguments are not destinations; click their claims to explore.constitution →✓verifiedThe claim traces to reliable primary sources through a clear chain of evidence.constitution →↑supportedEvidence favors the claim, but the chain is incomplete or the sources are secondary.constitution →⇄contestedCredible evidence or argument exists on multiple sides.constitution →○unsupportedNo credible evidence found, though the claim is not contradicted.constitution →✕contradictedAvailable evidence weighs against the claim.constitution →?unknownInsufficient information to assess.constitution →◌unassessedNo current assessment — the Steward prioritises higher-importance claims, so this one is likely still queued.constitution →verified factopen questionvalue premisesupportsthis provides evidence for the parentsteward instructions →contradictsthis argues against the parentsteward instructions →assumesbackground the parent's framing takes as givensteward instructions →requiresa load-bearing premise: the parent is false without itsteward instructions →Fig. — detail falls off with distance; every claim is an address.