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按卫生部关于开展法定传染病漏报调查方案,抽取杭州、宁波两市和桐乡、肖山、浦江三县,对1984年1～9月发生的23种法定传染病进行居民漏报和医院漏报调查。居民漏报调查采用分阶段整群随机抽样的方法。共调查28,323户、106,323人,查出法定传染病11
According to the investigation report of the Ministry of Health on Under-reporting of Statutory Infectious Diseases, the two counties of Hangzhou and Ningbo and the three counties of Tongxiang, Xiaoshan, and Pujiang were selected, and residents of the 23 statutory infectious diseases that occurred in January-September 1984 were missed by the residents and the hospital leaked. Report investigation. Resident underreport surveys adopt a phased cluster random sampling method. A total of 28,323 households and 106,323 people were investigated and identified as communicable diseases11