No evidence that mutations in SARS-CoV-2 variants of concern derive from homologous fragments in gut microbiota.

Abstract excerpt

Understanding the origin and evolution of mutations in SARS-CoV-2 variants of concern (VOCs) is a critical area of research. B. Cao, X. Wang, W. Yin, Z. Gao, and B. Xia (mBio 15:e03187-23, 2024, https://doi.org/10.1128/mbio.03187-23) proposed that these mutations originated from bacterial sequences incorporated into the viral genome through stochastic template-switching by the viral RNA-dependent RNA polymerase...

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