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Changes in Influenza Activities Impacted by NPI Based on 4-Year Surveillance in China: Epidemic Patterns and Trends

Authors :
Jing Tan
Lijun Liang
Ping Huang
Abrar A. Ibrahim
Zhongzhou Huang
Wei Zhao
Lirong Zou
Source :
Journal of Epidemiology and Global Health, Vol 13, Iss 3, Pp 539-546 (2023)
Publication Year :
2023
Publisher :
Springer, 2023.

Abstract

Abstract Background Since the Non-pharmaceutical Intervention (NPI) by COVID-19 emerged, influenza activity has been somewhat altered. Objectives The aim of this study was to explore changes in influenza activities in the context of COVID-19 based on the sentinel hospitals/units in Guangdong, southern China. Methods The surveillance data in influenza-like illness (ILI) were collected from 21 cities in Guangdong between September 2017 and August 2021, while 43 hospitals/units were selected to analyze the predominant types of influenza, population characteristics, and seasonal features by three methods (the concentration ratio, the seasonal index, and the circulation distribution), based on a descriptive epidemiological approach. Results During the four consecutive influenza seasons, a total of 157345 ILIs were tested, of which 9.05% were positive for influenza virus (n = 14238), with the highest positive rates for both IAV (13.20%) and IBV (5.41%) in the 2018–2019 season. After the emergence of COVID-19, influenza cases decreased near to zero from March 2020 till March 2021, and the dominant type of influenza virus changed from IAV to IBV. The highest positive rate of influenza existed in the age-group of 5 ~

Details

Language :
English
ISSN :
22106014
Volume :
13
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Journal of Epidemiology and Global Health
Publication Type :
Academic Journal
Accession number :
edsdoj.9afe7c3779b45838db51f793a5225c4
Document Type :
article
Full Text :
https://doi.org/10.1007/s44197-023-00134-z