Original Article
Epidemiological characteristics of influenza-like illness outbreaks in Wuhan, 2012-2017
Peng Wang, Deguang Kong, Ying Wang, Xiaobing Yang
Published 2019-02-25
Cite as Int J Virol, 2019, 26(1): 37-40. DOI: 10.3760/cma.j.issn.1673-4092.2019.01.011
Abstract
ObjectiveTo understand the epidemiological characteristics of influenza-like illness (ILI) outbreaks in Wuhan city from 2012 to 2017, and to provide a scientific basis for influenza prevention.
MethodsInformation of the ILI outbreaks reported in the city from 2012 to 2017 was collected for the analyses of time, places and virus types of the outbreaks.
ResultsA total of 19 ILI outbreaks were reported in the city from 2012 to 2017. Fifteen outbreaks were laboratory confirmed, including 11 outbreaks caused by influenza B virus (73.33%). Of the 19 ILI outbreaks, 16 (84.21%, 16/19) occurred in schools, including 11 outbreaks (57.89%, 11/19) in primary schools. The medians value of time intervals between the index case onset to the reporting was 7 (1-20) days, and the medians value of duration of the outbreaks was 25 (10-46) days. The time interval was positively correlated to duration of outbreaks (r=0.71, P<0.01).
ConclusionsILI outbreaks occurred mainly in primary schools in Wuhan from 2012 to 2017. Timely reporting of the outbreaks and early implementation of control measures were the key points to control influenza outbreak.
Key words:
Influenza; Influenza-like illness; Epidemiological characteristics
Contributor Information
Peng Wang
Infectious Disease Control and Prevention Division, Wuhan Center for Disease Prevention and Control, Wuhan 430015, China
Deguang Kong
Infectious Disease Control and Prevention Division, Wuhan Center for Disease Prevention and Control, Wuhan 430015, China
Ying Wang
Pathogen Detection Division, Wuhan Center for Disease Premention and Control, Wuhan 430015, China
Xiaobing Yang
Infectious Disease Control and Prevention Division, Wuhan Center for Disease Prevention and Control, Wuhan 430015, China