Epidemiology of fatal cases associated with pandemic H1N1 influenza 2009.
Open accessAbstract
This article describes the characteristics of 574 deaths associated with pandemic H1N1 influenza up to 16 July 2009. Data (except from Canada and Australia) suggest that the elderly may to some extent be protected from infection. There was underlying disease in at least half of the fatal cases. Two risk factors seem of particular importance: pregnancy and metabolic condition (including obesity which has not been considered as risk factor in previous pandemics or seasonal influenza).
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The CFR in Argentina by July 16, 2009 was 4.5% (3056 cases, 137 deaths).
“by July 16, 2009, just two months later, the number of cases in Argentina totaled 3056, with 137 deaths, representing a computed CFR of 4.5% [2].”
From Streptococcus pneumoniae coinfection is correlated with the severity of H1N1 pandemic influenza (2009) · cites this paper as [2]
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- Authors
- Vaillant, L., La Ruche, G., Tarantola, A., Barboza, P., & for the epidemic intelligence team at InVS
- Affiliations
- Institut de Veille Sanitaire (FR)
- French Institute for Public Health Surveillance (Institut de Veille Sanitaire, InVS), St Maurice, France
- Venue
- Eurosurveillance
- Published
- 2009-08-20
- Volume
- 14
- Issue
- 33
- ISSN
- 1025-496X (ISSN-L)
- 1560-7917
- OpenAlex
- W1421343027
- Cited by
- 348
- References
- 16
- Citations by year
- 2026: 6 · 2025: 4 · 2024: 5 · 2023: 5 · 2022: 11 · 2021: 16 · 2020: 17 · 2019: 10 · 2018: 8 · 2017: 8 · 2016: 5 · 2015: 7 · 2014: 11 · 2013: 20 · 2012: 40
- FWCI
- 45.27
- Type
- journal article
- Language
- en
- Open access
- diamond
- doi.org
- Locations
- Eurosurveillance (publishedVersion, cc-by)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Medicine › Epidemiology › Influenza Virus Research Studies
- Health Sciences › Medicine › Epidemiology › Respiratory viral infections research
- Health Sciences › Medicine › Infectious Diseases › Viral Infections and Outbreaks Research
- Keywords
- influenza mortality, fatal case, older adults, underlying disease, pregnancy, obesity, metabolic disorders, risk factors
- MeSH terms
- Adult, Aged, Child, Disease Outbreaks, Female, Humans, Influenza, Human, Pregnancy, Risk Factors, Incidence, Survival Rate, Survival Analysis, Age Distribution, Sex Distribution, Risk Assessment, Internationality, Influenza A Virus, H1N1 Subtype
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
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