一起无症状感染者引起的新型冠状病毒肺炎聚集性疫情调查分析

Investigation of An Aggregation Epidemic of Novel Coronavirus Pneumonia Caused by Asymptomatic Infection

目的分析达州市一起聚集性疫情传播链,查找感染来源,为新冠肺炎防控提供科学依据。方法对2020-02-05/15达州市某医院报告的4例确诊病例和1例无症状感染者流行病学资料进行分析。结果 4例确诊病例由1例无症状感染者经家庭共同生活和社会交往而感染新型冠状病毒发病,其中2例为共同生活感染,2例为社会交往感染。结论无症状感染者可作为新型冠状病毒肺炎的传染源,需重点关注,同时在追查传染源时可将范围进一步扩大,尽可能发现无症状感染者,减少其他人感染风险。

Objective To analyze the transmission chain,find the source of infection,and provide a scientific basis for the prevention and control of novel coronary pneumonia. Methods Epidemiological data of 4 confirmed cases and 1 asymptomatic patient reported in a hospital from February 5 to 15, 2020 were analyzed. Results The 4 confirmed cases were infected by a asymptomatic person through family life and social interaction. Specifically, 2 cases were infected by living together, and 2 cases were infected by social interaction. Conclusion Asymptomatic carriers can be the source of infection of the novel coronavirus pneumonia, which needs to be focused on. Meanwhile,when tracing the source of infection,the scope can be further expanded to detect asymptomatic infections as far as possible aiming to reduce the risk of infection for others.