The effect of nonpharmaceutical interventions on influenza virus transmission

BackgroundThe use of nonpharmaceutical interventions (NPIs) during severe acute respiratory syndrome 2019 (COVID-19) outbreaks may influence the spread of influenza viruses. This study aimed to evaluate the impact of NPIs against SARS-CoV-2 on the epidemiological features of the influenza season in...

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Main Authors: Danlei Chen, Ting Zhang, Simiao Chen, Xuanwen Ru, Qingyi Shao, Qing Ye, Dongqing Cheng
Format: Article
Language:English
Published: Frontiers Media S.A. 2024-02-01
Series:Frontiers in Public Health
Subjects:
Online Access:https://www.frontiersin.org/articles/10.3389/fpubh.2024.1336077/full
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author Danlei Chen
Danlei Chen
Ting Zhang
Simiao Chen
Xuanwen Ru
Qingyi Shao
Qingyi Shao
Qing Ye
Dongqing Cheng
author_facet Danlei Chen
Danlei Chen
Ting Zhang
Simiao Chen
Xuanwen Ru
Qingyi Shao
Qingyi Shao
Qing Ye
Dongqing Cheng
author_sort Danlei Chen
collection DOAJ
description BackgroundThe use of nonpharmaceutical interventions (NPIs) during severe acute respiratory syndrome 2019 (COVID-19) outbreaks may influence the spread of influenza viruses. This study aimed to evaluate the impact of NPIs against SARS-CoV-2 on the epidemiological features of the influenza season in China.MethodsWe conducted a retrospective observational study analyzing influenza monitoring data obtained from the China National Influenza Center between 2011 and 2023. We compared the changes in influenza-positive patients in the pre-COVID-19 epidemic, during the COVID-19 epidemic, and post-COVID-19 epidemic phases to evaluate the effect of NPIs on influenza virus transmission.ResultsNPIs targeting COVID-19 significantly suppressed influenza activity in China from 2019 to 2022. In the seventh week after the implementation of the NPIs, the number of influenza-positive patients decreased by 97.46% in southern regions of China and 90.31% in northern regions of China. However, the lifting of these policies in December 2022 led to an unprecedented surge in influenza-positive cases in autumn and winter from 2022 to 2023. The percentage of positive influenza cases increased by 206.41% (p < 0.001), with high positivity rates reported in both the northern and southern regions of China.ConclusionOur findings suggest that NPIs against SARS-CoV-2 are effective at controlling influenza epidemics but may compromise individuals’ immunity to the virus.
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spelling doaj.art-a8bb3a2986a8432f9fde9891e295e3152024-02-08T04:35:39ZengFrontiers Media S.A.Frontiers in Public Health2296-25652024-02-011210.3389/fpubh.2024.13360771336077The effect of nonpharmaceutical interventions on influenza virus transmissionDanlei Chen0Danlei Chen1Ting Zhang2Simiao Chen3Xuanwen Ru4Qingyi Shao5Qingyi Shao6Qing Ye7Dongqing Cheng8School of Medical Technology and Informatlon Engineering, Zhejiang Chinese Medical University, Hangzhou, ChinaDepartment of Laboratory Medicine, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, ChinaSchool of Medical Technology and Informatlon Engineering, Zhejiang Chinese Medical University, Hangzhou, ChinaDepartment of Laboratory Medicine, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, ChinaDepartment of Laboratory Medicine, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, ChinaSchool of Medical Technology and Informatlon Engineering, Zhejiang Chinese Medical University, Hangzhou, ChinaDepartment of Laboratory Medicine, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, ChinaDepartment of Laboratory Medicine, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, National Children's Regional Medical Center, Hangzhou, ChinaSchool of Medical Technology and Informatlon Engineering, Zhejiang Chinese Medical University, Hangzhou, ChinaBackgroundThe use of nonpharmaceutical interventions (NPIs) during severe acute respiratory syndrome 2019 (COVID-19) outbreaks may influence the spread of influenza viruses. This study aimed to evaluate the impact of NPIs against SARS-CoV-2 on the epidemiological features of the influenza season in China.MethodsWe conducted a retrospective observational study analyzing influenza monitoring data obtained from the China National Influenza Center between 2011 and 2023. We compared the changes in influenza-positive patients in the pre-COVID-19 epidemic, during the COVID-19 epidemic, and post-COVID-19 epidemic phases to evaluate the effect of NPIs on influenza virus transmission.ResultsNPIs targeting COVID-19 significantly suppressed influenza activity in China from 2019 to 2022. In the seventh week after the implementation of the NPIs, the number of influenza-positive patients decreased by 97.46% in southern regions of China and 90.31% in northern regions of China. However, the lifting of these policies in December 2022 led to an unprecedented surge in influenza-positive cases in autumn and winter from 2022 to 2023. The percentage of positive influenza cases increased by 206.41% (p < 0.001), with high positivity rates reported in both the northern and southern regions of China.ConclusionOur findings suggest that NPIs against SARS-CoV-2 are effective at controlling influenza epidemics but may compromise individuals’ immunity to the virus.https://www.frontiersin.org/articles/10.3389/fpubh.2024.1336077/fullinfluenza virusCOVID-19nonpharmaceutical interventions (NPIs)Chinainfection
spellingShingle Danlei Chen
Danlei Chen
Ting Zhang
Simiao Chen
Xuanwen Ru
Qingyi Shao
Qingyi Shao
Qing Ye
Dongqing Cheng
The effect of nonpharmaceutical interventions on influenza virus transmission
Frontiers in Public Health
influenza virus
COVID-19
nonpharmaceutical interventions (NPIs)
China
infection
title The effect of nonpharmaceutical interventions on influenza virus transmission
title_full The effect of nonpharmaceutical interventions on influenza virus transmission
title_fullStr The effect of nonpharmaceutical interventions on influenza virus transmission
title_full_unstemmed The effect of nonpharmaceutical interventions on influenza virus transmission
title_short The effect of nonpharmaceutical interventions on influenza virus transmission
title_sort effect of nonpharmaceutical interventions on influenza virus transmission
topic influenza virus
COVID-19
nonpharmaceutical interventions (NPIs)
China
infection
url https://www.frontiersin.org/articles/10.3389/fpubh.2024.1336077/full
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