Figure 1.

DENV serotype distribution across sites

(A) Distribution of DENV serotypes 1–4 from the sites from which samples were received for this study. Serotype distribution for each site is shown as pie charts over time. Total numbers from the site are indicated, and each serotype is represented by a different color. (B) The number of whole-genome sequences available from India. Yellow represents sequences available before the study, and blue represents the sequences obtained in this study. Shades of yellow and blue represent different serotypes of dengue. (C–F) Phylogenetic trees for DENV1–4 using the maximum likelihood method are shown. All available complete DENV coding nucleotide sequences from human hosts were used for the tree construction. Sylvatic strains were used as outgroups to root the tree. Branches have been collapsed to aid in the visualization. Regions where Indian sequences are present are colored in red.