After an 18-year absence, dengue virus serotype 3 reemerged in the South Pacific Islands in 2013. Outbreaks in western (Solomon Islands) and eastern (French Polynesia) regions were caused by different genotypes. This finding suggested that immunity against dengue virus serotype, rather than virus genotype, was the principal determinant of reemergence.
Keywords: French Polynesia; Solomon Islands; South Pacific Islands; dengue; dengue virus; dengue virus type 3; genotype; phylogenetics; serotype; viruses.