Epidemiological investigation of a clustering of COVID-19 in Rui’anChinese Full Text
QIAN Lizhen;ZHENG Zhiqiang;HONG Wansheng;
Abstract: 目的对瑞安市一起新型冠状病毒肺炎(COVID-19)聚集性疫情开展流行病学调查,为提高COVID-19疫情防控能力提供依据。方法按照《新型冠状病毒感染的肺炎疫情防控方案(试行)》对所有病例进行流行病学调查,收集病例发病就诊经过、临床资料和流行病学史等资料,追踪密切接触者,分析聚集性疫情的传播链及传播代际。结果本起疫情从1月23日发现至2月24日结案经历31 d,共报告11例COVID-19确诊病例,分布于3个家庭,呈家庭聚集性。其中武汉市输入病例1例,为本次疫情的传染源;续发本地病例10例,包括二代病例5例,三代病例1例,四代病例1例,代际不明3例。有明确聚餐引起传播1例,家人同住引起传播4例,偶尔接触并聚餐引起传播2例,传播途径为呼吸道飞沫和密切接触;传播方式不明3例,有间接接触、潜伏期传染、同一密闭空间气溶胶传播的可能。除10例续发病例外,共排查到密切接触者127人,经过14 d隔离医学观察,检测严重急性呼吸道综合征冠状病毒2型核酸均为阴性,所有病例均治愈出院。结论这是一起由武汉市输入病例引起的本地聚集性疫情,传播途径主要呼吸道飞沫传播和密切接触,也有间接接触、潜伏期传播、气溶胶传播的可能。
- DOI:
10.19485/j.cnki.issn2096-5087.2020.05.013
- Series:
(E) Medicine & Public Health
- Subject:
Preventive Medicine and Hygiene; Disease of Respiratory System
- Classification Code:
R563.1;R181.3
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