Mosquito-borne Diseases in Mainland China
1992 Vol.8 NO.5
Malaria has long been an important health problem. In 1932, soon after the lower part of Chang Jiang (Yangtze) was flooded, an epidemic of malaria occurred, with 60% incidence and 300,000 deaths. Before 1949, an estimation showed that half of the total population was at risk of infection, 70% of the counties were endemic of malaria, and 30 million cases occurred yearly.