SynthesisInfluenza and other respiratory viruses2011
Systematic review of clinical and epidemiological features of the pandemic influenza A (H1N1) 2009.
Synthesis in Influenza and other respiratory viruses, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 46 papers, 1 of them a synthesis that pooled it.
What it found
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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
46 citing papers in PubMed, 1 synthesis or guideline pooled it, 89 citations in OpenAlex.
- Pooled it
- Appropriate time-interval application of alcohol hand gel on reducing influenza-like illness among preschool children: a randomized, controlled trial.American journal of infection control · 2012Trial
- Efficacy, safety, and pharmacokinetics of intravenous peramivir in children with 2009 pandemic H1N1 influenza A virus infection.Antimicrobial agents and chemotherapy · 2012Trial
- Emerging Microorganisms and Infectious Diseases: One Health Approach for Health Shared Vision.Genes · 2024Review
- Comparison of geological clusters between influenza and COVID-19 in Thailand with unsupervised clustering analysis.PloS one · 2024Article
- Estimating SARS-CoV-2 infections and associated changes in COVID-19 severity and fatality.Influenza and other respiratory viruses · 2023Article
- [Headache associated with COVID-19 vaccination: how to classify?]Schmerz (Berlin, Germany) · 2023Article
- Pulmonary bacterial infections in adult patients hospitalized for COVID-19 in standard wards.Infectious diseases now · 2022Observational
- Extracorporeal Membrane Oxygenation Support for Influenza A: Retrospective Review of the Extracorporeal Life Support Organization Registry Comparing H1N1 With Other Subtypes.Critical care explorations · 2021Article
- Risk Factors of Influenza-Associated Respiratory Illnesses Reported to a Sentinel Hospital of Lahore, Pakistan: 2015-2016.The Canadian journal of infectious diseases & medical microbiology = Journal canadien des maladies infectieuses et de la microbiologie medicale · 2021Article
- The Host Response to Viral Infections Reveals Common and Virus-Specific Signatures in the Peripheral Blood.Frontiers in immunology · 2021Article
- Article
- Does this patient have COVID-19? A practical guide for the internist.Internal and emergency medicine · 2020Review
- Pulmonary and cardiac pathology in African American patients with COVID-19: an autopsy series from New Orleans.The Lancet. Respiratory medicine · 2020Article
- School closure in response to epidemic outbreaks: Systems-based logic model of downstream impacts.F1000Research · 2020Article
- Covid-19 Kills More Men Than Women: An Overview of Possible Reasons.Frontiers in cardiovascular medicine · 2020Review
- Influenza Infections and Emergent Viral Infections in Intensive Care Unit.Seminars in respiratory and critical care medicine · 2019Review
- Understanding Platelets in Infectious and Allergic Lung Diseases.International journal of molecular sciences · 2019Review
- Antibody levels in a cohort of pregnant women after the 2009 influenza A(H1N1) pandemic: Waning and association with self-reported severity and duration of illness.Influenza and other respiratory viruses · 2019Article
- Using Clinical Research Networks to Assess Severity of an Emerging Influenza Pandemic.Clinical infectious diseases : an official publication of the Infectious Diseases Society of America · 2018Observational
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The aim of this systematic review was to summarise the clinical and epidemiological features of the pandemic influenza A (H1N1) 2009. We did a systematic search of published literature reporting clinical features of laboratory-confirmed pandemic influenza A (H1N1) 2009 from 1 April 2009 to 31 January 2010. Forty-four articles met our inclusion criteria for the review. The calculated weighted mean age of confirmed cases was 18·1 years, with the median ranging from 12 to 44 years. Cough (84·9%), fever (84·7%), headache (66·5%), runny nose (60·1%) and muscle pain (58·1%) were the most common symptoms of confirmed cases. One or more pre-existing chronic medical conditions were found in 18·4% of cases. Almost two-thirds (64%) of cases were aged between 10 and 29 years, 5·1% were aged over 50 years and only 1·1% were aged over 60 years. The confirmed case fatality ratio was 2·9% (95% CI 0·0-6·7%), an extracted average from 12 of 42 studies reporting fatal cases (937 fatal cases among 31,980 confirmed cases), which gives an overall estimated infected case fatality ratio of 0·02%. Early in the pandemic, disease occurred overwhelmingly in children and younger adults, with cough and fever as the most prevalent clinical symptoms of the confirmed cases. A high infection rate in children and young adults, with sparing of the elderly population, has implications for pandemic influenza management and control policies.
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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.