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陈芳, 吴家兵, 姜静静, 马婉婉, 孙袁芳, 卢思琦, 龚磊, 侯赛, 宋丹丹, 朱梦, 苏斌, 刘志荣. 安徽省新型冠状病毒肺炎聚集性疫情流行特征与防控措施分析[J]. 中国公共卫生, 2020, 36(4): 469-472. DOI: 10.11847/zgggws1128674
引用本文: 陈芳, 吴家兵, 姜静静, 马婉婉, 孙袁芳, 卢思琦, 龚磊, 侯赛, 宋丹丹, 朱梦, 苏斌, 刘志荣. 安徽省新型冠状病毒肺炎聚集性疫情流行特征与防控措施分析[J]. 中国公共卫生, 2020, 36(4): 469-472. DOI: 10.11847/zgggws1128674
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Fang CHEN, Jia-bing WU, Jing-jing JIANG, Wan-wan MA, Yuan-fang Sun, Si-qi Lu, Lei Gong, Sai Hou, Dan-dan Song, Meng Zhu, Bin Su, Zhi-rong Liu. Epidemiological characteristics of clusters of COVID-19 in Anhui province[J]. Chinese Journal of Public Health, 2020, 36(4): 469-472. DOI: 10.11847/zgggws1128674
Citation: Fang CHEN, Jia-bing WU, Jing-jing JIANG, Wan-wan MA, Yuan-fang Sun, Si-qi Lu, Lei Gong, Sai Hou, Dan-dan Song, Meng Zhu, Bin Su, Zhi-rong Liu. Epidemiological characteristics of clusters of COVID-19 in Anhui province[J]. Chinese Journal of Public Health, 2020, 36(4): 469-472. DOI: 10.11847/zgggws1128674
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安徽省新型冠状病毒肺炎聚集性疫情流行特征与防控措施分析

Epidemiological characteristics of clusters of COVID-19 in Anhui province

    摘要
  • 摘要:
      目的  了解安徽省新型冠状病毒肺炎（COVID-19）聚集性疫情的流行特征，为改进防控措施提供依据。
      方法  采用中国疾病预防控制信息系统已审核的2020年1月1日 — 2月23日安徽省COVID-19病例和聚集性疫情信息，分析流行特征。
      结果  安徽省2020年1月23日 — 2月23日共报告COVID-19聚集性疫情176起，累计报告病例564例，其中确诊病例497例，占全省确诊病例数的50.3 %（497/989），阳性检测者67例，占全省阳性检测者52.8 %（67/127）。以家庭聚集性疫情为主，占聚集性疫情总数的90.9 %（160/176），高峰期在2月3日 — 2月11日，16个地市均有报告，主要分布在皖北地区，占48.9 %（86/176）。感染来源的构成比随时间改变，首发病例具有武汉及周边旅居史的疫情占比从81.8 %下降到18.9 %，首发病例具有本地暴露史的疫情占比从0上升到40.5 %。感染方式主要为亲人共同生活、亲朋聚餐，占53.4 %（31/58）。
      结论  安徽省COVID-19聚集性疫情以家庭聚集性为主，主要分布在皖北地区，感染来源逐渐由武汉输入病例转为本地感染病例，亲人共同生活、亲朋聚餐是主要传播方式。

     

    Abstract:
      Objective  To examine epidemiological characteristics of cluster epidemic of novel coronavirus disease 2019 (COVID-19) in Anhui province for providing evidences to prevention and control of the epidemic.
      Methods  The data on confirmed COVID-19 cases reported from January 1st to February 23rd, 2020 in Anhui province were extracted from Information System for Disease Prevention and Control sponsored by China Center for Disease Control and Prevention. Descriptive statistics was conducted to analyze the clustering of the reported cases.
      Results  During the period from January 23 to February 23, 2020, a total of 176 clusters of COVID-19 were identified in the province, involving 564 cases reported and 90.9% of the cluster incidences occurred in family settings. For all the reported cases, 497 were confirmed cases, accounting for 50.3% (497/989) of the total confirmed cases during the period in the province; among the confirmed cases, 67 were positive for 2019 novel coronavirus (2019-nCov) nucleic acid, accounting for 52.8% (67/127) of all positive cases during the period. A peak from 3 – 11 February was observed for the clustering incidence occurred in all 16 prefectures across the province and 48.9% (86/146) of the cluster cases were reported in northern regions of the province. The proportion of the transmission source varied over time; the ratio of the first cases of the clustering incidents with the history of travelling experience in Wuhan city decreased from 81.8% to 18.9% but that of the first case with the history of contacting with local suspected infections increased from 0 to 40.5%. Of all the clustering incidents, 53.4% were probably due to exposures of living together and having dinner together with relatives.
      Conclusion  The clustering of novel coronavirus disease 2019 were mainly familial clusters in Anhui province and about a half of the clusters occurred in northern regions of the province. The exposure history of the first cases of the clusters changed from in Wuhan city initially to local regions subsequently. Living together and having dinner party with relatives or friends are probably the main ways of infection transmission.

     

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