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Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) genome organization and the distribution of the SARS-CoV-2 genome sequence used in this study. (A) Genomic architecture of SARS-CoV-2 based on the reference sequence (Wuhan-Hu-1, NCBI accession NC_045512). (B) The temporal and geographic distribution of all sequences. All temporal analyses were based on the date of sequence collection.
