武汉市某小学校水痘暴发疫情调查

Investigation of varicella outbreak in a primary school,Wuhan

目的对武汉市某小学校水痘暴发疫情开展调查并提出防控措施。方法采用描述流行病学方法对全校基本情况和患病学生进行深入调查分析。结果此次疫情共发现28例水痘临床诊断病例,罹患率为1.05%。发病有两个高峰期;病例集中在三年级;年龄最小7岁,最大11岁;全校水痘疫苗接种率为70.27%,此次水痘疫情疫苗保护率为45.63%。结论由于早期隔离措施不彻底造成二代病例发生,接种水痘疫苗有一定的保护作用,但是仍有突破病例的发生。

Objectives To investigate the varicella outbreak in a school and propose prevention and control measures. Methods Descriptive epidemiological method was used to investigate the basic situation of whole school and those students suffered from varicella. Results Totally,28 patients with clinical diagnosis of varicella were found,and the incidence rate was 1.05 %. There were two peaks in the varicella outbreak, and most of the cases were found in the third grade. Among the cases, the youngest was 7 years old and the eldest was 11 years old. The varicella vaccination rate was 70.27% in the school, and the vaccination protection rate was 45.63%. Conclusion Secondary cases could happen due to the uncompletely early isolation. Although vaccination against varieella has protective effect, there are still new cases.