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V1/V2 sequences from two mother-infant pairs whose infants were infected intrapartum. A total of 24–30 V1/V2 env clones from each mother and infant were sequenced, aligned using MAFFT, and used to build a maximum likelihood phylogenetic tree. Maternal samples are represented by squares and infant samples are represented by circles (MHP 2017 = open shapes; MHP 3765=filled shapes). Parenthesis represent the number of clones with identical sequences.
