Figure 5.

Total incidence of the six long-studied diseases in different provinces in China since 1950

The national distribution of the incidence rates of the six long-studied diseases: the darker the color, the higher the incidence rate. Chongqing became a municipality directly under the central government in 1997; prior to 1997 it belonged to Sichuan Province, so disease epidemic data were not listed separately until 1997. When calculating the incidence before 1997, we used the incidence rate of Sichuan Province. In addition, subregional information for the 11 diseases was only collected in 2016.