Table 1.

Basic characteristics of county A in 2011

Variables	Units
Area	2035 km2
Population	386,000
Annual income per capita of rural residents	7400 RMBa
No. of towns	21
No. of villages	182
No. of village clinics	206
No. of village doctors	579
Incidence of infectious diseaseb	668/105/year

^aRinminbi; in 2012, the exchange of Chinese currency was about 6.31 RMB for 1 US$ according to the World Bank

^bReported by County A’s County Center for Disease Control and Prevention