Abstract:The SARS-COV-2 virus, which causes the COVID-19, is rapidly accumulating mutations to adapt to the hosts. We collected SARS-COV-2 sequence data from the end of 2019 to April 2022 to analyze for their evolutionary features during the pandemic. We found that most of the SARS-COV-2 genes are undergoing negative purifying selection, while the spike protein gene (S-gene) is undergoing rapid positive selection. From the original strain to the alpha, delta and omicron variant types, the Ka/Ks of the S-gene increases,… Show more
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