ArticleBMJ open respiratory research2023
Global variability of influenza activity and virus subtype circulation from 2011 to 2023.
Article in BMJ open respiratory research, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.
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22 citing papers in PubMed, 23 citations in OpenAlex.
- Epidemiology and severity of pediatric influenza hospitalizations before and during the COVID-19 pandemic: a surveillance study of the Canadian immunization monitoring program (IMPACT), 2012-2023.Lancet regional health. Americas · 2026Article
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- Burden and risk factors of influenza-associated acute respiratory infections among older adults in India: a multicentric community-based surveillance (2018-2023).The Lancet regional health. Southeast Asia · 2026Article
- Genome sequence of influenza virus strain A/Ust-Kamenogorsk/972/2023 (H3N2) from Kazakhstan.Microbiology resource announcements · 2026Article
- Comparative Analysis of Flight Volume Effects on COVID-19 and Influenza Transmission Across Variable Control Intensities, 2019-2024.The Journal of infectious diseases · 2026Article
- A hybrid model for influenza forecasting in Xinjiang: adapting to complex seasonality and post-COVID-19 structural breaks.BMC public health · 2026Article
- How Has the COVID-19 Pandemic Affected the Influenza Seasonality Patterns in Different Climate Regions?-A Time-Series Analysis.Health science reports · 2026Article
- Suppression and resurgence: the evolving epidemiology of seasonal influenza from 2015 to 2024 in a core urban district of Beijing, China.Frontiers in public health · 2026Article
- Clinical Characteristics Associated with Mortality in Children with Critically Ill Influenza B in the Pediatric Intensive Care Unit.Infection and drug resistance · 2026Article
- Changes in the Epidemiology of Influenza and Respiratory Syncytial Virus During 2020-2022 Relative to the Pre-COVID-19 Pandemic Period (2017-2020) From Systematic Sentinel Syndromic Surveillance in South Africa.Influenza and other respiratory viruses · 2026Article
- Integrating Surveillance and Stakeholder Insights to Predict Influenza Epidemics: A Bayesian Network Study in Queensland, Australia.International journal of environmental research and public health · 2026Article
- Clinical epidemiology of community-acquired pneumonia in children before, during, and after the COVID-19 pandemic, and independent risk factors analysis for severe community-acquired pneumonia.Journal of global health · 2025Article
- Viral characterization of the reassortants between canine influenza H3N2 and human pandemic (2009) H1N1 and avian H9N2 viruses in canine ex vivo tracheal explants.Virology journal · 2025Article
- Changes in influenza-associated excess mortality in China between 2012-2019 and 2020-2021: a population-based statistical modelling study.Infectious diseases of poverty · 2025Article
- Article
- Incidence of Confirmed Influenza and Pneumococcal Infections and Vaccine Uptake Among Virologically Suppressed People Living with HIV.Vaccines · 2025Article
- Influenza A virus continues to circulate among children in Linyi, northern China, after the relaxation of COVID-19 control measures.Scientific reports · 2024Article
- Changes in the Epidemiological Features of Influenza After the COVID-19 Pandemic in China, the United States, and Australia: Updated Surveillance Data for Influenza Activity.Interactive journal of medical research · 2024Article
- Impact of the COVID-19 Pandemic on Influenza Hospital Admissions and Deaths in Wales: Descriptive National Time Series Analysis.JMIR public health and surveillance · 2024Article
- Proportions and Seasonal Patterns of Respiratory Viruses via Rapid Tests in Adults at a Greek Hospital (Oct. 2023-Mar. 2024).Journal of personalized medicine · 2024Article
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundAlthough decreased influenza activity has been reported in many countries during the COVID-19 pandemic, it remains unknown how global influenza activity has changed. We described the global variability of influenza activity and virus subtype circulation from 2011 to 2023 to prepare for the potential influenza outbreak with the control of the COVID-19 pandemic.
methodsInfluenza virological surveillance data between 2011 and 2023 were obtained from the WHO-FluNet database. We first calculated and compared the influenza activity before and during the COVID-19 pandemic. For countries whose influenza activity has recovered, we also described changes in the duration of influenza epidemics. We then determined the proportion of influenza cases caused by the different influenza virus types.
resultsIn total, 73 countries with 2.17 million influenza cases were included. In the early stage of the COVID-19 pandemic, decreased influenza activity was observed in all WHO regions. In 2022 and 2023, rebound in influenza activity was observed in all WHO regions, especially in Western Pacific Region. At the same time, a change in the duration of the influenza epidemic was observed in several Southern Hemisphere countries. Moreover, in all WHO regions, few B/Yamagata viruses were detected during the COVID-19 pandemic.
conclusionsLack of exposure to influenza will diminish population immunity and increase the severity of large epidemics on a future global resurgence. Ongoing monitoring of the changes in the duration of the influenza epidemic and circulation subtypes should be the focus of future work.
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