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Despite potential biases from minimal data filtering, the basic parameters of the growing epidemic—including a mutation rate of 1 × 10−3 to 2 × 10−3 mutations per site per year, a doubling time of 10–20 days, and a tMRCA around early December 2019—would all have been evident by 1 February 2020
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https://www.nature.com/articles/s41586-026-11012-6
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Seven tips for a graceful lab exit | Nature

https://www.nature.com/articles/d41586-026-02452-1
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