New strains of Japanese encephalitis virus circulating in Shanghai, China after a ten-year hiatus in local mosquito surveillance

Map of survey sites for the mosquito-borne pathogen surveillance programme in 2016 in Shanghai, China. Squares represent sites using the CO2-baited trap, triangles represent sites using the labor hour method and color-filled symbols represent Japanese encephalitis virus detection. Abbreviations: HP, Huangpu District; XH, Xuhui District; CN, Changning District; JA, Jing’an District; PT, Putuo District; HK, Hongkou District; YP, Yangpu Distric