Epidemiological characteristics of a local cluster epidemic caused by the BA.2 evolutionary branch of Omicron variant
10.3760/cma.j.cn112150-20230828-00131
- VernacularTitle: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
- Author:
Zhaokai HE
1
;
Zhe WANG
;
Qingjun KAO
;
Shi CHENG
;
Shuang FENG
;
Tingting ZHAO
;
Yanyang TAO
;
Xinfen YU
;
Zhou SUN
Author Information
1. 杭州市疾病预防控制中心传染病防制所，杭州 310021
- Keywords:
Severe acute respiratory syndrome coronavirus 2;
Cluster epidemic;
Omicron variant;
Epidemiological characteristics
- From:
Chinese Journal of Preventive Medicine
2024;58(1):65-70
- CountryChina
- Language:Chinese
-
Abstract:
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.
