Fig. 4

a Locations and isolation years of JEVs. Geographical locations of genotype 1 JEVs isolated in Isahaya, Goto, Okinawa, Taiwan, and China are shown in red, blue, green, purple, and black color, respectively, with subcluster name and year of isolation. b Geographical locations of the seven subclusters of JEV genotype 1. Seven subclusters of JEV genotype 1 isolated in Isahaya, Goto, Okinawa, Taiwan, and China are shown in red, blue, green, purple, and black color, respectively, with year of isolation