Epidemiological characteristics of COVID-19 epidemic in Ejina banner, Inner Mongolia Autonomous Region, October 2021.
10.3760/cma.j.cn112338-20211118-00899
- VernacularTitle:2021年10月内蒙古自治区额济纳旗新型冠状病毒肺炎疫情流行病学特征分析
- Author:
Hui LI
1
;
Wen Rui WANG
1
;
Meng Guang FAN
1
;
Bo Xi LIU
2
;
Xiao Feng JIANG
1
;
Xiao Ling TIAN
1
;
Yun Feng XI
3
;
Ru Yu BAI
3
;
Fu Li CHI
1
;
Sheng Mei YANG
4
Author Information
1. Institute for Communicable Disease Prevention and Control, Inner Mongolia Autonomous Region Center for Disease Control and Prevention, Hohhot 010031, China.
2. Emergency Response Office, Inner Mongolia Autonomous Region Center for Disease Control and Prevention, Hohhot 010031, China.
3. Institute for Chronic Disease and Endemic Disease Prevention and Control, Inner Mongolia Autonomous Region Center for Disease Control and Prevention, Hohhot 010031, China.
4. Institute for Public Health, Inner Mongolia Autonomous Region Center for Disease Control and Prevention, Hohhot 010031, China.
- Publication Type:Journal Article
- MeSH:
Adolescent;
Adult;
Aged;
Aged, 80 and over;
COVID-19;
Child;
Child, Preschool;
China/epidemiology*;
Epidemics;
Female;
Humans;
Infant;
Male;
Middle Aged;
SARS-CoV-2;
Young Adult
- From:
Chinese Journal of Epidemiology
2022;43(2):189-194
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To understand the epidemiological characteristics of COVID-19 epidemic in Ejina banner, Inner Mongolia, in October 2021 and provide evidence for the improvement of COVID-19 prevention and control. Methods: The information about the time, area and population distributions of COVID-19 cases in Ejina before November 13, 2021 and the gene sequencing result of the isolates were collected for a statistical descriptive analysis. Results: The first COVID-19 case in Ejina occurred on 7 October, 2021. A total of 164 COVID-19 cases were reported from October 19 to November 12. Most cases were distributed in 6 communities in Darahub (156 cases, 95.12%). The result of full gene sequencing of the isolates indicted that the pathogen was Delta variant (B.1.617.2). The male to female ratio of the cases was 1.3∶1. The age of cases ranged from 1 to 85 years, and the cases aged 20-59 years accounted for 78.66%. The main clinical symptoms were sore throat (91 cases, 91.92%), cough (49 cases, 49.49%) and fever (23 cases, 23.23%). Most cases were ordinary ones (81 cases, 49.39%) and mild ones (68 cases, 41.46%). The cases were mainly detected at the isolation points (84 cases, 51.22%) and through population based nucleic acid testing (62 cases, 37.80%). The basic reproduction number (R0) of COVID-19 was 5.3, the average incubation period was 3.9 days. The local government rapidly started Ⅳ level emergency response and conducted 10 rounds of nucleic acid tests. The transferring of travelers reduced the risk for the further spread of COVID-19 in Ejina. Conclusions: The epidemic of COVID-19 in Ejina characterized by strong transmission, short incubation period, herd susceptibility and case clustering. Delta variant (B.1.617.2) was the pathogen, which might be imported from Zeke port. Comprehensive prevention and control measures, such as closed-loop management and vaccination, should be continued. The successful transferring of the patients and travelers provided evidence for the effective and precise prevention and control of COVID-19 in a routine manner.
