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Evolutionary analysis based on SARS CoV-2 variant BF.7. A) Phylogenetic tree based on 1,434 genome sequence of the BF.7 variant from all countries. The red dot represents the genome collected from China, and the black dot represents the sample collected from other countries. B) Phylogenetic tree based on genomes containing BF.7 genomes collected from different provinces in China (showed in different colored blocks). The collection date ranged from September 2022 to January 2023.
