Methods Using National Electronic Disease Surveillance System to output cards and screen for clustered cases, and statistically analyze its effect on reducing disease outbreaks with SPSS 11.5 software.

• 方法利用国家疾病监测信息管理系统导出卡片；筛查得出聚集性病例；利用SPSS11.；5软件统计分析对降低爆发疫情的作用。