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[Analysis on medical observation of 1 665 close contacts of COVID-19 cases].
Ma, Q L; Li, P; Chen, X L; Wu, Z J; Liu, C P; Wang, X X; Wu, W J; Li, H Y.
  • Ma QL; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Li P; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Chen XL; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Wu ZJ; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Liu CP; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Wang XX; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Wu WJ; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
  • Li HY; Yinchuan Municipal Center for Disease Control and Prevention, Ningxia Hui Autonomous Region, Yinchuan 750001, China.
Zhonghua Liu Xing Bing Xue Za Zhi ; 41(12): 2020-2023, 2020 Dec 10.
Article in Chinese | MEDLINE | ID: covidwho-1000358
ABSTRACT

Objective:

To understand the identification and medical observation of close contacts of COVID-19 cases in a city and provide scientific basis for the adjustment of the epidemic prevention and control strategies.

Methods:

Descriptive epidemiological methods were used to analyze the general characteristics of all the close contacts of COVID-19 cases in a city. Throat swabs were collected from the close contacts for real-time fluorescent RT-PCR. The confirmed cases were diagnosed according to diagnosis and treatment of COVID-19 (trial version 5).

Results:

Among the 1 665 close contacts of COVID-19 cases in a city, 10 were diagnosed as COVID-19 cases during the medical observation period, accounting for 30.30% of all the confirmed cases in a city, most of them were close relatives of the confirmed cases. The longest contact time with the confirmed cases was 8 days and the shortest was 0 days. Ten COVID-19 cases in close contacts constituted to six family clusters.

Conclusions:

In COVID-19 prevention and control in a city, the active tracking of the transmission chains of the confirmed cases and timely identification of the close contacts were conducted. The people who had close contacts with the confirmed COVID-19 cases within 14 days before onset were all placed under medical observation, which played a key role in the effective prevention and control of COVID-19 epidemic in a city. Nearly one third of COVID-19 cases occurred during the medical observation period, so the infection sources were effectively controlled and transmission routes were effectively blocked, which greatly facilitated the prevention of the clusters of COVID-19 cases.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Contact Tracing / Epidemics / COVID-19 Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Humans Country/Region as subject: Asia Language: Chinese Journal: Zhonghua Liu Xing Bing Xue Za Zhi Year: 2020 Document Type: Article Affiliation country: Cma.j.cn112338-20200227-00197

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Contact Tracing / Epidemics / COVID-19 Type of study: Diagnostic study / Experimental Studies / Observational study / Prognostic study / Randomized controlled trials Limits: Humans Country/Region as subject: Asia Language: Chinese Journal: Zhonghua Liu Xing Bing Xue Za Zhi Year: 2020 Document Type: Article Affiliation country: Cma.j.cn112338-20200227-00197