Chikungunya virus in Europe: A retrospective epidemiology study from 2007 to 2023
Fig 5
Phylogenetic and genotyping analyses.
(A) A maximum-likelihood phylogenetic tree based on the E1 glycoprotein. After aligned, a total of 69 publicly available chikungunya virus genomes are used in the analysis. The chikungunya virus sequences collected during the 2017 outbreak in Italy are labeled with a blue column. (B) Spatiotemporal distribution of chikungunya virus genotypes. All available genome sequences of chikungunya virus are used.