Updated at 2:45 p.m. on March 21, 2023
Last week, the ongoing debate about COVID-19’s origins acquired a new plot twist. A French evolutionary biologist stumbled across a trove of genetic sequences extracted from swabs collected from surfaces at a wet market in Wuhan, China, shortly after the pandemic began; she and an international team of colleagues downloaded the data in hopes of understanding who—or what—might have ferried the virus into the venue. What they found, as The Atlantic first reported on Thursday, bolsters the case for the pandemic having purely natural roots: The genetic data suggest that live mammals illegally for sale at the Huanan Seafood Wholesale Market—among them, raccoon dogs, a foxlike species known to be susceptible to the virus—may have been carrying the coronavirus at the end of 2019.
But what might otherwise have been a straightforward story on new evidence has rapidly morphed into a mystery centered on the origins debate’s data gaps. Within a day or so of nabbing the sequences off a database called GISAID, the researchers told me, they reached out to the Chinese scientists who had uploaded the data to share some preliminary results. The next day, public access to the sequences was locked—according to GISAID, at the request of the Chinese researchers, who had previously analyzed the data and drawn distinctly different conclusions about what they contained.
Yesterday evening, the international team behind the new Huanan-market analysis released a report on its findings—but did not post the underlying data. The write-up confirms that genetic material from raccoon dogs and several other mammals was found in some of the same spots at the wet market, as were bits of SARS-CoV-2’s genome around the time the outbreak began. Some of that animal genetic material, which was collected just days or weeks after the market was shut down, appears to be RNA—a…
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