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[Epidemiological characteristics of an epidemic of 2019-nCoV Omicron variant infection in Beijing].
Zhonghua Liu Xing Bing Xue Za Zhi. 2022 Dec 10; 43(12):1881-1886.ZL

Abstract

Objective: To analyze the epidemiological characteristics and transmission chain of an epidemic of COVID-19 in Haidian district, Beijing. Methods: Descriptive epidemiological method was used to analyze the epidemiological characteristics of the epidemic, and field investigation and big data technology were used to analyze the transmission chain of the epidemic. Results: From April 27 to May 13, 2022, an epidemic of COVID-19 occurred in Haidian district. The strains isolated from the cases were identified by whole genome sequencing as Omicron variant (BA.2.2 evolutionary branch). A total of 38 infection cases were detected, including 34 confirmed cases and 4 asymptomatic cases. Most cases were mild ones (88.2%), no severe, critical or death cases occurred. The early clinical symptoms were mainly sore throat (50.0%) and cough (29.4%). The epidemic lasted for 17 days, resulting in 7 generations of the cases and involving 3 community transmissions, 2 working place transmissions and 8 family transmissions; the main infection routes were co-residence (47.6%) and co-space exposure (31.6%). The intergenerational interval M(Q1, Q3)was 3 (1, 6) days. The overall secondary attack rate was 1.5% (37/2 482), and the family secondary attack rate was 36.7% (18/49). Conclusions: The cases in this COVID-19 epidemic caused by Omicron variant had mild clinical symptoms, but the case clustering in families and communities was obvious, the transmission was rapid, and the risk for co-space exposure was high. It is necessary to use information technology to identify close contacts in the local population for the rapid and effective blocking of the epidemic spread.

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Authors+Show Affiliations

Department of Infectious Diseases and Endemic Disease Control, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Infectious Diseases and Endemic Disease Control, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Infectious Diseases and Endemic Disease Control, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Infectious Diseases and Endemic Disease Control, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Infectious Diseases and Endemic Disease Control, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Immunization Program, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Immunization Program, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Department of Microbiology, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

General Office, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Business Office, Beijing Haidian District Center for Disease Control and Prevention, Beijing 100094, China.

Institute of Infectious Diseases and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing 100013, China.

Institute of Infectious Diseases and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing 100013, China.

Institute of Infectious Diseases and Endemic Disease Control, Beijing Center for Disease Prevention and Control, Beijing 100013, China.

MeSH

HumansCOVID-19BeijingSARS-CoV-2Epidemics

Pub Type(s)

English Abstract

Journal Article

Language

chi

PubMed ID

36572458

Citation

Sun, Y M., et al. "[Epidemiological Characteristics of an Epidemic of 2019-nCoV Omicron Variant Infection in Beijing]." Zhonghua Liu Xing Bing Xue Za Zhi = Zhonghua Liuxingbingxue Zazhi, vol. 43, no. 12, 2022, pp. 1881-1886.

Sun YM, Liu F, Cai W, et al. [Epidemiological characteristics of an epidemic of 2019-nCoV Omicron variant infection in Beijing]. Zhonghua Liu Xing Bing Xue Za Zhi. 2022;43(12):1881-1886.

Sun, Y. M., Liu, F., Cai, W., Jin, L. N., Guo, L., Cai, R., Shi, R. J., Liu, F. Y., Jiang, C., Fu, J. Y., Pan, Y., Dou, X. F., & Wu, S. S. (2022). [Epidemiological characteristics of an epidemic of 2019-nCoV Omicron variant infection in Beijing]. Zhonghua Liu Xing Bing Xue Za Zhi = Zhonghua Liuxingbingxue Zazhi, 43(12), 1881-1886. https://doi.org/10.3760/cma.j.cn112338-20220901-00753

Sun YM, et al. [Epidemiological Characteristics of an Epidemic of 2019-nCoV Omicron Variant Infection in Beijing]. Zhonghua Liu Xing Bing Xue Za Zhi. 2022 Dec 10;43(12):1881-1886. PubMed PMID: 36572458.

* Article titles in AMA citation format should be in sentence-case

TY - JOUR T1 - [Epidemiological characteristics of an epidemic of 2019-nCoV Omicron variant infection in Beijing]. AU - Sun,Y M, AU - Liu,F, AU - Cai,W, AU - Jin,L N, AU - Guo,L, AU - Cai,R, AU - Shi,R J, AU - Liu,F Y, AU - Jiang,C, AU - Fu,J Y, AU - Pan,Y, AU - Dou,X F, AU - Wu,S S, PY - 2022/12/26/entrez PY - 2022/12/27/pubmed PY - 2022/12/27/medline SP - 1881 EP - 1886 JF - Zhonghua liu xing bing xue za zhi = Zhonghua liuxingbingxue zazhi JO - Zhonghua Liu Xing Bing Xue Za Zhi VL - 43 IS - 12 N2 - Objective: To analyze the epidemiological characteristics and transmission chain of an epidemic of COVID-19 in Haidian district, Beijing. Methods: Descriptive epidemiological method was used to analyze the epidemiological characteristics of the epidemic, and field investigation and big data technology were used to analyze the transmission chain of the epidemic. Results: From April 27 to May 13, 2022, an epidemic of COVID-19 occurred in Haidian district. The strains isolated from the cases were identified by whole genome sequencing as Omicron variant (BA.2.2 evolutionary branch). A total of 38 infection cases were detected, including 34 confirmed cases and 4 asymptomatic cases. Most cases were mild ones (88.2%), no severe, critical or death cases occurred. The early clinical symptoms were mainly sore throat (50.0%) and cough (29.4%). The epidemic lasted for 17 days, resulting in 7 generations of the cases and involving 3 community transmissions, 2 working place transmissions and 8 family transmissions; the main infection routes were co-residence (47.6%) and co-space exposure (31.6%). The intergenerational interval M(Q1, Q3)was 3 (1, 6) days. The overall secondary attack rate was 1.5% (37/2 482), and the family secondary attack rate was 36.7% (18/49). Conclusions: The cases in this COVID-19 epidemic caused by Omicron variant had mild clinical symptoms, but the case clustering in families and communities was obvious, the transmission was rapid, and the risk for co-space exposure was high. It is necessary to use information technology to identify close contacts in the local population for the rapid and effective blocking of the epidemic spread. SN - 0254-6450 UR - https://www.unboundmedicine.com/medline/citation/36572458/[Epidemiological_characteristics_of_an_epidemic_of_2019_nCoV_Omicron_variant_infection_in_Beijing]_ DB - PRIME DP - Unbound Medicine ER -