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Tracing Management and Epidemiological Characteristics of COVID-19 Close Contacts in Cities Around Chengdu, China.
Front Public Health. 2021; 9:645798.FP

Abstract

Introduction: Close contacts have become a potential threat to the spread of coronavirus disease 2019 (COVID-19). The purpose of this study was to understand the epidemiological characteristics of close contacts of confirmed or suspected cases of COVID-19 in the surrounding cities of Chengdu, China, so as to provide a basis for the management strategy of close contacts. Methods: Close contacts were determined through epidemiological investigation of indicated cases, and relevant information was entered in the "Close Contact Information Management System." Retrospective data of close contacts from January 22 to May 1, 2020 were collected and organized. Meanwhile, the contact mode, isolation mode, and medical outcome of close contacts were descriptively analyzed. Results: A total of 986 close contacts were effectively traced, with an average age of (36.69 ± 16.86) years old, who were mainly distributed in cities of eastern Chengdu. The frequency of contact was mainly occasional contact, 80.42% of them were relatives and public transportation personnel. Besides, the time of tracking close contacts and feedback was (10.64 ± 5.52) and (7.19 ± 6.11) days, respectively. A total of seven close contacts were converted to confirmed cases. Conclusions: Close contacts of COVID-19 have a risk of invisible infection. Early control of close contacts may be helpful to control the epidemic of COVID-19.

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Authors+Show Affiliations

Emergency and Business Management Office, Chengdu Center for Disease Control and Prevention, Chengdu, China.

Department of Orthopaedics, Chengdu Medical College, Chengdu, China.

Emergency and Business Management Office, Chengdu Center for Disease Control and Prevention, Chengdu, China.

Emergency and Business Management Office, Chengdu Center for Disease Control and Prevention, Chengdu, China.

Emergency and Business Management Office, Chengdu Center for Disease Control and Prevention, Chengdu, China.

Department of Infectious Disease Control, Center for Disease Control and Prevention of Chenghua District, Chengdu, China.

Emergency and Business Management Office, Chengdu Center for Disease Control and Prevention, Chengdu, China.

MeSH

AdultCOVID-19ChinaCitiesContact TracingHumansMiddle AgedRetrospective StudiesSARS-CoV-2Young Adult

Pub Type(s)

Journal Article

Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

34976905

Citation

Yang, Kai, et al. "Tracing Management and Epidemiological Characteristics of COVID-19 Close Contacts in Cities Around Chengdu, China." Frontiers in Public Health, vol. 9, 2021, p. 645798.

Yang K, Deng J, Wang L, et al. Tracing Management and Epidemiological Characteristics of COVID-19 Close Contacts in Cities Around Chengdu, China. Front Public Health. 2021;9:645798.

Yang, K., Deng, J., Wang, L., Jiang, S., Lu, R., Liu, Z., & Tuo, X. (2021). Tracing Management and Epidemiological Characteristics of COVID-19 Close Contacts in Cities Around Chengdu, China. Frontiers in Public Health, 9, 645798. https://doi.org/10.3389/fpubh.2021.645798

Yang K, et al. Tracing Management and Epidemiological Characteristics of COVID-19 Close Contacts in Cities Around Chengdu, China. Front Public Health. 2021;9:645798. PubMed PMID: 34976905.

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

TY - JOUR T1 - Tracing Management and Epidemiological Characteristics of COVID-19 Close Contacts in Cities Around Chengdu, China. AU - Yang,Kai, AU - Deng,Jiali, AU - Wang,Liang, AU - Jiang,Shan, AU - Lu,Rong, AU - Liu,Zhijian, AU - Tuo,Xiaoli, Y1 - 2021/12/15/ PY - 2020/12/24/received PY - 2021/11/10/accepted PY - 2022/1/3/entrez PY - 2022/1/4/pubmed PY - 2022/1/8/medline KW - COVID-19 KW - close contact KW - epidemic prevention and control KW - epidemiological KW - tracking SP - 645798 EP - 645798 JF - Frontiers in public health JO - Front Public Health VL - 9 N2 - Introduction: Close contacts have become a potential threat to the spread of coronavirus disease 2019 (COVID-19). The purpose of this study was to understand the epidemiological characteristics of close contacts of confirmed or suspected cases of COVID-19 in the surrounding cities of Chengdu, China, so as to provide a basis for the management strategy of close contacts. Methods: Close contacts were determined through epidemiological investigation of indicated cases, and relevant information was entered in the "Close Contact Information Management System." Retrospective data of close contacts from January 22 to May 1, 2020 were collected and organized. Meanwhile, the contact mode, isolation mode, and medical outcome of close contacts were descriptively analyzed. Results: A total of 986 close contacts were effectively traced, with an average age of (36.69 ± 16.86) years old, who were mainly distributed in cities of eastern Chengdu. The frequency of contact was mainly occasional contact, 80.42% of them were relatives and public transportation personnel. Besides, the time of tracking close contacts and feedback was (10.64 ± 5.52) and (7.19 ± 6.11) days, respectively. A total of seven close contacts were converted to confirmed cases. Conclusions: Close contacts of COVID-19 have a risk of invisible infection. Early control of close contacts may be helpful to control the epidemic of COVID-19. SN - 2296-2565 UR - https://www.unboundmedicine.com/medline/citation/34976905/Tracing_Management_and_Epidemiological_Characteristics_of_COVID_19_Close_Contacts_in_Cities_Around_Chengdu_China_ DB - PRIME DP - Unbound Medicine ER -