Maximum clade credibility (MCC) phylogeny based on the complete coding region of 74 CHIKV sequences.

<p>The three major CHIKV genotypes are labelled, as well as the IOL within the ECSA clade. Sequences generated from this study (Genbank accession numbers (KR046227 –KR046234) are labelled in blue. Nodes with clade credibilities (posterior probabilities) ≥ 0.95 are labelled accordingly. The clade credibility for the node supporting the Trinidad and BVI sequences is shown in the insert together with the mean estimated time to most recent common ancestor (tMRCA) in years (with 95% HPD in brackets).