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嵊泗县处于亚热带边缘,系间日疟流行区。据统计,50年代疟疾年平均发病率42.90/万,属中度流行区。开展疟防工作后,发病率逐年呈持续稳定下降。60年代年平均发病率降为8.21/万,1970～1974年年平均发病率为7.04/万,其中1954年、1963年、1973年为流行最高年份,发病率分别为
Shengsi County in the subtropical edge, the Department of vivax epidemic area. According to statistics, the average annual incidence of malaria in the 1950s was 42.90 / million, a moderate endemic area. After the malaria prevention work was carried out, the incidence rate showed a steady and steady decline year by year. The average annual incidence in the 1960s dropped to 8.21 / million, the average annual incidence rate from 1970 to 1974 was 7.04 / million, of which 1954, 1963 and 1973 were the highest prevalence years, the incidence rates were