北京市海淀区新型冠状病毒肺炎疫情初期聚集性疫情特征分析  

Characteristics of clustered outbreaks in the early stage of COVID-19 epidemic in Haidian district,Beijing

作　　者：孙亚敏[1] 刘锋[1] 蔡伟[1] 金丽娜 郭黎[1] 刘方遥[2] 王菊光[3] 江初[3] 富继业[4] 窦相峰[5] Sun Yamin;Liu Feng;Cai Wei;Jin Lina;Guo Li;Liu Fangyao;Wang Juguang;Jiang Chu;Fu Jiye;Dou Xiangfeng(Department of Infectious Diseases and Endemic Disease Control,Haidian District Center for Disease Prevention and Control,Beijing 100094,China;Department of Microbiology,Haidian District Center for Disease Prevention and Control,Beijing 100094,China;Office of Haidian District Center for Disease Prevention and Control,Beijing 100094,China;Business Office of Haidian District Center for Disease Prevention and Control,Beijing 100094,China;Institute of Infectious Diseases and Endemic Disease Control,Beijing Center for Disease Prevention and Control,Beijing 100013,China)

机构地区：[1]北京市海淀区疾病预防控制中心传染病地方病控制科,100094 [2]北京市海淀区疾病预防控制中心微生物检验科,100094 [3]北京市海淀区疾病预防控制中心办公室,100094 [4]北京市海淀区疾病预防控制中心业务办公室,100094 [5]北京市疾病预防控制中心传染病地方病控制所,100013

出　　处：《国际病毒学杂志》2022年第2期155-158,共4页International Journal of Virology

摘　　要：目的分析北京市海淀区新型冠状病毒肺炎(COVID-19)疫情初期聚集性疫情特征,为今后疫情防控提供参考。方法收集2020年1月20日—2月28日海淀区COVID-19聚集性疫情感染者资料,采用描述性流行病学方法分析疫情特征。结果疫情初期海淀区共发生聚集性疫情13起,涉及感染者45例,死亡5例,以家庭聚集(11/13)、外省输入(9/13)为主;潜伏期传播4起;潜伏期M(P_(25),P_(75))为5(3.5,7.5)d;代间距M(P_(25),P_(75))为5(3.5,11.5)d;50%(13/26)的主动就医患者多次就诊;84.1%(37/44)的病例于发病前2d至发病后7d检出新冠病毒核酸;总续发率11.6%(29/249),家庭续发率32.1%(27/84)。结论海淀区COVID-19疫情初期以家庭聚集为主,提高病例早期识别能力、集中隔离密切接触者及尽早采样,有利于遏制疫情传播。Objective To analyze the epidemiological characteristics of clustered outbreaks in the early stage of the coronavirus disease 2019(COVID-19)epidemic in Haidian district,Beijing,so as to provide reference for future epidemic prevention and control.Methods The data of patients in the COVID-19 clustered outbreaks in Haidian district from January 20 to February 28,2020 were collected,and the characteristics of the epidemic were analyzed by descriptive epidemiological methods.Results In the early stage of the epidemic,a total of 13 clustered outbreaks occurred in Haidian District,involving 45 infected patients,including 5 deaths.The outbreaks were mainly family clusters(11/13)and imported cases from other provinces(9/13).Four outbreaks caused by transmission during the incubation period were observed.The incubation period,M(P_(25),P_(75))was 5(3.5,7.5)d and the serial intervals,M(P_(25),P_(75))was 5(3.5,11.5)d.For patients proactively seeking medical attention,50%(13/26)had multiple visits at hospitals.The nucleic acid of severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)was detected in 84.1%(37/44)of the cases between 2 days before and 7 days after disease onset.The overall secondary attack rate was 11.6%(29/249)while the rate in family was 32.1%(27/84).Conclusions In the early stage of the COVID-19 epidemic in Haidian district,the outbreaks were mainly family clusters.Improving the ability in early identification of the cases,quarantine of close contacts and timely sample collection will assist controlling the epidemic from expanding.

关 键 词：新型冠状病毒肺炎 聚集性疫情 续发率 

分 类 号：R563.1[医药卫生—呼吸系统] R181.8[医药卫生—内科学]