一起由Omicron变异株BA.2进化分支引起的本土聚集性疫情流行病学特征分析

Epidemiological characteristics of a local cluster epidemic caused by the BA.2 evolutionary branch of Omicron variant

应用描述性流行病学方法,对2022年3月杭州市发生在余杭区物流园区的新型冠状病毒感染本土聚集性疫情的流行病学特点进行分析。此次聚集性疫情由1例发热门诊主动就诊的病例发现,疫情历时8 d,共发现病例58例,其中男性40例,女性18例;年龄为(33.29±12.22)岁;工人53例,学生2例,农民、老师和待业人员各1例;主要分布在杭州市的余杭区(48例,82.77%)和上城区(7例,12.07%)。实时再生数最高是在3月10日为2.31,于3月15日降至0.37。指示病例测序结果与韩国2022年3月4日上传的1条序列100%同源。

Descriptive epidemiological methods were used to analyze the epidemiological characteristics of the local cluster of COVID-19 in the logistic park of Yuhang District in Hangzhou in March 2022.The cluster epidemic was detected by a case who actively visited the fever clinic.The epidemic lasted for 8 days,and a total of 58 cases(53 workers,2 students,1 farmer,1 teacher and 1 unemployed)were found,including 40 males and 18 females.The age was(33.29±12.22)years.There cases were mainly in Yuhang District(48 cases,82.77%)and Shangcheng District(7 cases,12.07%)of Hangzhou.The real-time regeneration number peaked at 2.31 on March 10 th and decreased to 0.37 on March 15 th.The sequencing result of the indicated case was 100%homologous with the sequence uploaded from South Korea on March 4 th,2022.