Fig. 2.

Phylodynamic history of the DENV-2 sequences to estimate the introduction dates for the regional circulation – Maximum clade credibility tree of Dengue-2 E-gene sequences. The phylogenetic relationships and temporal evolutionary history have been estimated based on molecular clock analysis. Branch lengths are temporally scaled, and the x-axis presents a time scale (years before present - y.b.p). In the left panel zoom of the main tree, date estimates at the node level are depicted in a green square given in year by past (y.b.p.). The red squares numbered 1, 2 and 3 represent, respectively, the t_MRCA of the putative introduction of DENV-2 on the Seychelles, on the Seychelles-Reunion Island, and at the regional level.