Dengue Virus Serotype 3 Origins and Genetic Dynamics, Jamaica.

We identified 3 clades of dengue virus serotype 3 belonging to genotype III isolated during 2019-2020 in Jamaica by using whole-genome sequencing and phylogenomic and phylogeographic analyses. The viruses likely originated from Asia in 2014. Newly expanded molecular surveillance efforts in Jamaica will guide appropriate public health responses.