Figure 1.
MCC tree of the 139 ZIKV sequences included in this study. The posterior clade support is displayed at each branching point. The names of all virus sequences that were isolated in Florida, USA, are highlighted in green and all sequences from Brazil are highlighted in magenta. The cluster of sequences highlighted in green represents the twenty-three strains of the USA data set that form one monophyletic cluster upon exclusion of one non-USA sequence. The MCC tree was obtained using the BDSKY model in BEAST 2 with δ = 18.25, three intervals for Re and a relaxed clock (see Supplementary Figs S1 and S2 for other model parametrizations).