ArticleJournal of medical virology2021
Influenza season 2020-2021 did not begin in Finland despite the looser social restrictions during the second wave of COVID-19: A nationwide register study.
Article in Journal of medical virology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 1 of them a synthesis that pooled it.
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17 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Vaccination against influenza viruses reduces infection, not hospitalization or death, from respiratory COVID-19: A systematic review and meta-analysis.Journal of medical virology · 2024Pooled it
- Impact of COVID-19 control measures on influenza positivity among patients with acute respiratory infections, 2018-2023: an interrupted time series analysis.BMC infectious diseases · 2025Article
- Study on the impact of meteorological factors on influenza in different periods and prediction based on artificial intelligence RF-Bi-LSTM algorithm: to compare the COVID-19 period with the non-COVID-19 period.BMC infectious diseases · 2024Article
- Effectiveness of annual influenza campaigns and vaccination in reducing influenza burden in nursing homes of Canton Vaud in Switzerland.Antimicrobial resistance and infection control · 2024Article
- Urgent Hospitalizations Related to Viral Respiratory Disease in Children during Autumn and Winter Seasons 2022/2023.Viruses · 2023Article
- Research note changes in the number of outpatient visits in Japan during the COVID-19 pandemic.BMC research notes · 2023Article
- Unusual late epidemic peak during influenza season 2021-2022: A nationwide register-based analysis in Finland.Influenza and other respiratory viruses · 2022Article
- Respiratory healthcare professionals' views on long-term recommendations of interventions to prevent acute respiratory illnesses after the COVID-19 pandemic.ERJ open research · 2022Article
- Respiratory virus circulation in children after relaxation of COVID-19 restrictions in fall 2021-A nationwide register study in Finland.Journal of medical virology · 2022Article
- Record high parainfluenza season in children after relaxation of COVID-19 restrictions in fall 2021-A nationwide register study in Finland.Influenza and other respiratory viruses · 2022Article
- SARS-CoV-2 and other airborne respiratory viruses in outdoor aerosols in three Swiss cities before and during the first wave of the COVID-19 pandemic.Environment international · 2022Article
- The first winter of social distancing improved most of the health indexes in a paediatric emergency department.Acta paediatrica (Oslo, Norway : 1992) · 2022Article
- Article
- Social distancing during the COVID-19 pandemic resulted in a marked decrease in hospitalisations for bronchiolitis.Acta paediatrica (Oslo, Norway : 1992) · 2022Article
- Isolation precautions cause minor delays in diagnostics and treatment of non-COVID patients.Infection prevention in practice · 2021Article
- Rhinovirus spread in children during the COVID-19 pandemic despite social restrictions-A nationwide register study in Finland.Journal of medical virology · 2021Article
- Influenza season 2020-2021 did not begin in Finland despite the looser social restrictions during the second wave of COVID-19: A nationwide register study.Journal of medical virology · 2021Article
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Abstract
The nationwide lockdowns ended influenza seasons rapidly in Northern Hemisphere in Spring 2020. The strategy during the second wave was to minimize the restrictions set for children. Children spread influenza and therefore simultaneous influenza and COVID-19 surges were feared. The aim of this report is to analyze the epidemiology of influenza season 2020-2021 in Finland. Data for this retrospective register-based study were gathered from the National Infectious Disease Register, all laboratory-confirmed influenza cases from August 2017 to March 2021 were included. The positive influenza findings were stratified by age, and incidences per 100 000 persons were calculated. Only 41 influenza A and B cases have been reported in this season from August 2020 to March 2021, which adds up to an incidence of 0.9 per 100 000 person-years. In the three preceding years, the numbers and corresponding incidences from August to March were 12 461 (282 per 100 000 person-years) in 2019-2020, 15 276 (346 per 100 000 person-years) in 2018-2019, and 33 659 (761 per 100 000 person-years) in 2017-2018. Nonpharmaceutical interventions combined with the lockdown measures interrupted the influenza season in Finland in March 2020. Despite looser restrictions, alongside traveling restrictions and facial masks, failing to prevent the spread of the severe acute respiratory syndrome coronavirus 2 virus, these restrictions have proved to be effective against seasonal influenza.
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