ArticleInfluenza and other respiratory viruses2022
Change in patterns of hospitalization for influenza during COVID-19 surges.
Article in Influenza and other respiratory viruses, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 3 of them syntheses that pooled it.
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Who cites it
8 citing papers in PubMed, 3 syntheses or guidelines pooled it, 10 citations in OpenAlex.
- Differences in clinical characteristics between coronavirus disease 2019 (COVID-19) and influenza: a systematic review and meta-analysis.NPJ primary care respiratory medicine · 2025Pooled it
- Differences of the Chest Images Between Coronavirus Disease 2019 (COVID-19) Patients and Influenza Patients: A Systematic Review and Meta-analysis.International journal of medical sciences · 2025Pooled it
- Pooled it
- 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
- Survey of psychiatric symptoms among inpatients with COVID-19 using the Diagnosis Procedure Combination data and medical records in Japan.Brain, behavior, & immunity - health · 2023Article
- Influenza vaccine effectiveness in patients hospitalized with severe acute respiratory infection in Lithuania during the 2019-2020 influenza season: a test negative case - control study.Virology journal · 2023Article
- Article
- Change in patterns of hospitalization for influenza during COVID-19 surges.Influenza and other respiratory viruses · 2022Article
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Authors and funding
4 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundHospitalization due to influenza has been stable in recent years. In March 2020, New York was an epicenter for coronavirus disease 2019 (COVID-19). Because influenza and COVID-19 present similarly, there were serious concerns that coinfection of these viruses would burden the healthcare system. We compared incidence and outcomes of patients hospitalized with influenza before and during COVID-19 (seasons 2017-2021).
methodsWe conducted a retrospective study evaluating hospitalized patients with influenza. Four influenza seasons were evaluated, 2017-2021, pre- and during COVID-19 pandemic. We compared incidence of influenza and clinical outcomes across the seasons.
resultsWe found 412 patients hospitalized due to influenza in the study period; 394 had influenza, and 18 had both influenza and COVID-19 infections. Demographics across the four influenza seasons were comparable; the cohort was predominantly female (61%) and had an average age of 60 years old. Comorbid conditions were common. No outcome differences were found for patients with influenza when comparing influenza seasons prior to and during the COVID-19 pandemic. The mortality for the entire cohort was 6.5%. During the COVID-19 pandemic, there were 18 (4.4%) influenza patients coinfected with COVID-19 and 32 (7.8%) patients with bacterial super infection. Predictors of mortality in patients with influenza included presence of shock, heart failure, bacterial pneumonia, and use of mechanical ventilation. Coinfection with COVID-19 did not increase mortality.
conclusionWe observed a significant decrease in the incidence of hospitalization due to influenza during the COVID-19 pandemic. Clinical presentations and outcomes for patients with influenza remain stable. Being aware of possible increased mortality for patients with both influenza and bacterial pneumonia is important. Although coinfection with COVID-19 did not increase mortality in influenza patients, identifying the specific virus responsible for infections has major therapeutic implications.
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