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'Sleuth work': Researcher finds early sequence of Covid mysteriously gone

Study neither strengthens nor discounts the hypothesis that the pathogen leaked out of a China's Wuhan lab.

After inoculating a larger proportion of people than any other major economy, Britain is emerging as a test case in Europe as it attempts to draw a line under Covid-19. (Photo: Bloomberg)
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A vaccination centre somewhere in Britain. (Photo: Bloomberg)

Carl Zimmer | NYT
About a year ago, genetic sequences from more than 200 virus samples from early cases of Covid-19 in Wuhan disappeared from an online scientific database.

Now, by rooting through files stored on Google Cloud, a researcher in Seattle reports that he has recovered 13 of those original sequences — intriguing new information for discerning when and how the virus may have spilled over from a bat or another animal into humans.

The new analysis, released on Tuesday, bolsters earlier suggestions that a variety of coronaviruses may have been circulating in Wuhan before the initial outbreaks linked to animal and seafood

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