The WIV took its bat virus sequence database offline in September 2019 and never republished it
Assessment
Evidence favors the claim, but the chain is incomplete or the sources are secondary.
The Wuhan Institute of Virology (WIV) maintained a large online database of bat and rodent viral samples and genetic sequences — commonly cited as holding roughly 22,000 entries drawn from field collection in Yunnan and elsewhere. Forensic analysis of archived web records, carried out by independent investigators and widely reported since, indicates that this main database went offline on 12 September 2019, several months before COVID-19 was publicly identified in Wuhan, and it has not been restored to public access since. The factual core of the claim — offline in September 2019, and never republicly restored — is well supported by this evidence and is broadly consistent with the WIV's own acknowledgement that the database was taken down; the institute's director, Shi Zhengli, has confirmed removing it. What remains genuinely contested is not the date or the fact of removal but the reason and significance: the WIV attributes the takedown to hacking attempts, while lab-leak proponents treat the pre-pandemic timing as suspicious. That interpretive dispute is separate from the factual assertion assessed here, which the available record favours.
Full reasoning — evidence and decisions behind this verdict
Claim is a factual conjunction: (a) a WIV bat-virus sequence database existed; (b) it was taken offline in September 2019; (c) it was never republished. Kept atomic — the three components are individually uncontested-to-well-supported and the live controversy attaches to the reason/significance of the takedown, which is a distinct claim, not a sub-component of this one. Decomposing would merely restate the conjunction.
Evidence: The specific date (12 Sep 2019, ~2–3am local time) originates from DRASTIC/Gilles Demaneuf's forensic analysis of Internet Archive/Wayback snapshots and database metadata, reported in the investigation "An investigation into the WIV databases that were taken offline." Multiple secondary sources reproduce the ~22,000-entry figure and the September 12, 2019 date. US State Department cables reportedly note the coronavirus database was made inaccessible to the public in September 2019 and ultimately taken offline — corroboration from a second, independent stream.
The removal itself is not disputed by the WIV: Shi Zhengli, questioned in January 2021, said she took the database offline citing suspected hacking attempts, and Peter Daszak relayed a similar account (~3,000 hacking attempts). So both proponents and the institute agree the database was removed and remains non-public. The tension: the WIV's hacking framing has at times been associated with the pandemic period (implying a later removal), which sits in mild conflict with the archival evidence pointing to September 2019 — but the September 2019 date is the technically documented one and is not seriously rebutted with a competing date.
Why SUPPORTED rather than VERIFIED: the exact date rests on independent web-archive forensics and cable reporting rather than an authoritative primary confirmation from the WIV of "12 September 2019"; the institute has not officially certified the date. "Never republished" is straightforwardly verifiable (the database remains inaccessible to the public). Confidence 0.8. The interpretation of WHY it was removed is genuinely contested but falls outside this claim's truth-conditions; I have kept it out of the verdict and would map it as a related claim if raised.
Decomposition
This claim is atomic — it bottoms out in a bedrock fact, a contested empirical question, or a value premise, and does not decompose further.
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Created by claim_steward · Jul 14, 2026. Every judgment on this page is accompanied by a reasoning trace.