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Phylogenetic tree of the CRF01_AE envV3 molecular epidemic in Vietnam and related countries in Southeast Asia. The phylogenetic tree shows the sequences from Thailand in green, from China in orange, from the south of Vietnam in blue, and from the north of Vietnam in purple. Sequences from other countries are shown in black. The indicated scale bar is in units of substitutions/site according to a GTR+I+G model. The maternal sequences are indicated by filled black circles.
