Fig. 1
From: The 2017 Dengue virus 1 outbreak in northern Vietnam was caused by a locally circulating virus group
a Phylogenetic tree constructed by the whole genome sequence together with DENV1-4 standard strains and genotype I, II, IV and V sequences. The sample lists are attached to the supplementary material. The accession numbers of newly defined samples are also described in supplementary materials. b Expanded phylogenetic tree constructed by the complete E gene sequence together with genotype I isolates recorded in the ViPR database from 6 southeast or East Asian countries. Open circle: the Vietnames isolates between 2006 and 2008; Open triangle: between 2009 and 2011; Open square: between 2012 and 2014: black triangle: between 2015 and 2016: black circle: 2017, analyzed in this study