Epidemiological characteristics of family clusters of COVID-19in Henan Province
10.19485/j.cnki.issn2096-5087.2020.08.006
- VernacularTitle:河南省新型冠状病毒肺炎家庭聚集性疫情流行特征
- Author:
YE Ying
1
;
FAN Wei
;
WANG Wenhua
;
SHEN Xiaojing
;
ZHANG Xiaoxiao
;
PAN Jingjing
;
WANG Haifeng
;
HUANG Xueyong
Author Information
1. Henan Provincial Center for Disease Control and Prevention
- Publication Type:Journal Article
- Keywords:
coronavirus disease 2019 family cluster epidemiological characteristics
- From:
Journal of Preventive Medicine
2020;32(8):782-786
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To learn the epidemiological characteristics of family clusters of COVID-19 in Henan Province from January 23 to February 22, 2020, so as to provide reference for the prevention and control.
Methods:The data of family clusters of COVID-19 in Henan Province from January 23 to February 22 was retrieved from Public Health Emergency Management System, the epidemiological characteristics of time, space, population distribution and clinical feasures were analyzed.
Results:By February 22, there were 202 family clusters of COVID-19, with 546 cases reported in Henan Province, including 493 ( 90.29% ) confirmed cases and 53 ( 9.71% ) asymptomatic cases. There were 247 ( 45.24% ) imported cases and 299 ( 54.76% ) local cases. Most of the clusters were reported from January 25 to February 7, with 129 clusters accounting for 63.86% . The cases reported before February 5 were mainly imported ( 153 cases, 57.09% ) , after that local cases were predominant ( 168 cases, 68.29% ) . Eighteen cities in Henan Province all reported family clusters of COVID-19, with Xinyang, Zhengzhou, Nanyang, Zhumadian and Shangqiu as the top five. Most of the confirmed cases ( 430, 87.22% ) were mild. The median and longest incubation period was 8 and 17 days, respectively. The intergenerational distribution was dominated by first-generation and second-generation cases ( 537 cases, 98.35% ) . A total of 5 635 close contacts were tracked down, of whom 262 were secondary cases, with an incidence rate of 4.65%. The first cases of the family clusters were mainly imported from other provinces ( 149 cases, 73.76% ) .
Conclusions :The family clusters of COVID-19 in Henan Province were concentrated from January 25 to February 7. The source of infection mainly comes from other provinces. Most of the cases are first-and second-generation cases, with longer incubation period. Close contacts have higher incidence rate.
