Fig. 4.

Population of yellow fever-endemic cities, by travel vaccination policy, 2016

Notes: In total, there were 170 yellow fever-endemic cities, represented by circles on the map, in 35 countries. Yellow fever-endemic cities were located in areas where the World Health Organization recommended yellow fever vaccination. In the urban scenario (see main text for details), there was one fewer yellow fever-endemic city than in the base scenario: Tshikapa, Democratic Republic of the Congo (population 0.69 million).