新型冠状病毒肺炎患者次密切接触者感染风险分析
[Analysis on infection risk in secondary close contacts of COVID-19 patients].
作者信息
Yi B, Chu Y R, Chen Y, Zhang D L, Zhang Y W, Lei S, Hong L, Li Q F, Gu X M, Lao X Y, Wang H B, Lin J F, Xu Guozhang
机构信息
Ningbo Prefectural Center for Disease Control and Prevention, Ningbo 315010, China.
Zhenhai District Center for Disease Control and Prevention, Ningbo 315200, China.
出版信息
Zhonghua Liu Xing Bing Xue Za Zhi. 2022 Aug 10;43(8):1237-1240. doi: 10.3760/cma.j.cn112338-20220314-00186.
To study the infection rate of secondary close contacts of COVID-19 patients, and assess the infection risk in the contacts. COVID-19 patients' close contacts (with a clear exposure time to index case) with negative nucleic acid test results and secondary close contacts were surveyed in continuous isolation and medical observation in this prospective study. The dynamic nucleic acid test results of the close contacts and secondary contacts of COVID-19 patients were collected to assess their risk of infection. A total of 4 533 close contacts were surveyed, in whom 14 were confirmed as COVID-19 patients with overall secondary attack rate of 0.31%, and 4 201 secondary contacts were tracked, in whom no subsequent infections occurred. Close contacts of COVID-19 patients entered in centralized isolation for medical observation with negative nucleic acid tese results,the secondary close contacts of COVID-19 patients have no risk of infection.
为研究新型冠状病毒肺炎（COVID-19）患者的次密切接触者感染率，评估接触者的感染风险。在这项前瞻性研究中，对COVID-19患者核酸检测结果为阴性的密切接触者（有明确的与索引病例暴露时间）和次密切接触者进行持续隔离和医学观察。收集COVID-19患者密切接触者和次接触者的动态核酸检测结果，以评估其感染风险。共调查了4533名密切接触者，其中14人确诊为COVID-19患者，总二代发病率为0.31%，追踪了4201名次密切接触者，其中未发生后续感染。COVID-19患者核酸检测结果为阴性进入集中隔离医学观察的密切接触者，COVID-19患者的次密切接触者没有感染风险。
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