The Jiang lab at National Library of Medicine showed that viral-host chimeric RNAs are possible by analyzing direct RNA-seq SARS-CoV-2 data. Enabled by GISAID genomes, they identified putative host-derived insertions in circulating SARS-CoV-2 variants. This work is now published and available in mSystems journal at https://journals.asm.org/doi/10.1128/msystems.00179-22.
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