被动监测系统漏报率过高，其监测数据需要通过漏报调查，才能计算校正发病率。
Passive surveillance system, because of too high missing report rate, is not suitable to be used to estimate the incidence and only can be use for the estimation of epidemic trend.
方法按照《广州市法定传染病漏报调查方案》对抽查的医疗机构进行传染病漏报调查分析。
METHODS Investigation and analysis were conducted in light of the Investigation Program on Missing Reports of Guangzhou.
方法采用普查与随机抽查的方法对不同级别的医疗机构、居民进行法定报告传染病的漏报调查。
Methods Census and sampling survey were applied in the different level medical institutions and inhabitants to investigate the legal contagious diseases failed to report.
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