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Recombination among betacoronaviruses is biased toward lower pairwise genetic distances. Splitting at different taxonomic ranks (intraspecies, interspecies, and intersubgenus): (A) the distribution of recombination events involving parental viruses; (B) the distribution of all distances among sequences in the whole data set. The number of recombination events is scaled based on the highest value (which get the value of 1).
