SynthesisInternational journal of environmental research and public health2020
The Association between Influenza Vaccination and the Risk of SARS-CoV-2 Infection, Severe Illness, and Death: A Systematic Review of the Literature.
Synthesis in International journal of environmental research and public health, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
33 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
- Progress in combination vaccines and the co-administration of influenza virus and SARS-CoV-2 vaccines.Frontiers in immunology · 2025Review
- Clinical characteristics of COVID-19 in children and adolescents: insights from an Italian paediatric cohort using a machine-learning approach.BMJ public health · 2025Article
- Article
- Flu vaccine administration in the period before SARS-CoV-2 infection and its outcomes: An umbrella review.Preventive medicine reports · 2024Review
- [¿Disminuye la vacunación antigripal el riesgo de COVID-19? Estudio de casos y controles en un centro de Atención Primaria durante el año 2020.]Revista espanola de salud publica · 2023Article
- Insights for COVID-19 in 2023.Revista espanola de quimioterapia : publicacion oficial de la Sociedad Espanola de Quimioterapia · 2023Review
- The interactions of SARS-CoV-2 with cocirculating pathogens: Epidemiological implications and current knowledge gaps.PLoS pathogens · 2023Review
- The impact of influenza vaccination on surgical outcomes in COVID-19 positive patients: An analysis of 43,580 patients.PloS one · 2023Article
- Outcomes of COVID-19 Infection in People Previously Vaccinated Against Influenza: Population-Based Cohort Study Using Primary Health Care Electronic Records.JMIR public health and surveillance · 2022Article
- Does Influenza Vaccination Reduce the Risk of Contracting COVID-19?Journal of clinical medicine · 2022Article
- Article
- Influence of influenza vaccine and comorbidity on the evolution of hospitalized COVID-19 patients⋆.Medicina clinica (English ed.) · 2022Article
- Influence of influenza vaccine and comorbidity on the evolution of hospitalized COVID-19 patients.Medicina clinica · 2022Observational
- Influenza Vaccination and COVID-19 Outcomes in People Older than 50 Years: Data from the Observational Longitudinal SHARE Study.Vaccines · 2022Article
- Mitigating co-circulation of seasonal influenza and COVID-19 pandemic in the presence of vaccination: A mathematical modeling approach.Frontiers in public health · 2022Article
- The Effect of Influenza Vaccination on COVID-19 Morbidity, Severity and Mortality: Systematic Review and Meta-Analysis.The Malaysian journal of medical sciences : MJMS · 2021Review
- Risk of symptomatic severe acute respiratory syndrome coronavirus 2 infection not associated with influenza vaccination in the 2019-2020 season.Influenza and other respiratory viruses · 2021Article
- Attitudes toward the SARS-CoV-2 and Influenza Vaccination in the Metropolitan Cities of Bologna and Palermo, Italy.Vaccines · 2021Article
- HIV self-testing in Ottawa, Canada used by persons at risk for HIV: The GetaKit study.Canada communicable disease report = Releve des maladies transmissibles au Canada · 2021Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
We reviewed the association between seasonal influenza vaccination and the risk of SARS-CoV-2 infection or complicated illness or poor outcome (e.g., severe disease, need for hospitalization or ventilatory support, or death) among COVID-19 patients. None of the studies that were reviewed (
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What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.