Analysis of transmission characteristics of COVID-19 in Shaanxi Province
10.3760/cma.j.cn112150-20200227-00201
- VernacularTitle:陕西省新型冠状病毒肺炎病例的传播特点分析
- Author:
Shaoqi NING
1
;
Yi ZHANG
;
Lei CAO
;
Sa CHEN
;
Weihua WANG
;
Yunpeng NIAN
;
Ni ZHU
;
Guojing YANG
;
Xinxin LI
;
Shaobai ZHANG
Author Information
1. 陕西省疾病预防控制中心传染病预防控制所突发公共卫生事件应急管理办公室，西安 710054
- Keywords:
COVID-19;
Communication characteristics;
Latent period transmission
- From:
Chinese Journal of Preventive Medicine
2020;54(5):493-497
- CountryChina
- Language:Chinese
-
Abstract:
A total of 245 cases of COVID-19 in Shaanxi Province reported in the China information system for disease control and prevention as of February 24, 2020 were selected as the research objects, the cases are divided into imported cases (116 cases, 47.3%) and local cases (129 cases, 52.7%), their basic characteristics, time distribution, transmission mode, intergenerational interval and latent period transmission are analyzed. The age of local cases [(51.74±15.67) years old], female patients (69 cases, 53.5%), housework and retired staff (40 cases, 31.0%), and patients isolated at the time of onset (50 cases, 38.8%) were higher than imported cases, respectively[(40.66±15.41) years old, (45 cases, 38.8%), (21 cases, 18.1%), (17 cases, 14.6%)] ( P values were < 0.05); The infection rate was 0.8% (31/3 666) in close contacts with local cases, which was lower than imported cases 2.0% (69/3 435) ( P<0.001); The main source of infection in local cases was relatives (70 cases, 54.3%), and the main way of infection was living together and party (90 cases, 69.8%); the proportion of latent period transmission in our province was 15.5% (20 cases), and the interval between the second-generation case and the source of infection was about 4 days, and the interval between generations was about 6 days. In summary, the main way of infection of local cases in Shaanxi Province was living together and party, there were a certain proportion of latent period transmission cases at present, it's suggested that the investigation of close contacts should be started 4 days or earlier before the onset of the case.
