Preprint Open Access

Proposed SARS-CoV-2 Spillover During 2019 Review of Samples from a Mineshaft in Mojiang, Yunnan Province, China


This research examines the activity at the Wuhan Institute of Virology in late 2019, when samples from a mineshaft associated with a suspected SARS outbreak were being reviewed. It proposes that spillover may have occurred during this review of samples including of a virus (BtCoV/4991) only 1% different to SARS-CoV-2 in its RdRp.

23 August 2021 Update:

The findings presented in this preprint have been misattributed in CNN, Vanity Fair, the Washington Post and elsewhere. I, the author, made the discovery that the Wuhan Institute of Virology's bat virus database was taken offline on 12 September 2019. This was around a year before the discovery was misattributed to members of the Drastic group.

For media or other enquiries, please contact me at:

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