ArticleEinstein (Sao Paulo, Brazil)
Clinical aspects of influenza A(H1N1)pdm09 cases reported during the pandemic in Brazil, 2009-2010.
Article in Einstein (Sao Paulo, Brazil). The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers, 1 of them a synthesis that pooled it.
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4 citing papers in PubMed, 1 synthesis or guideline pooled it, 13 citations in OpenAlex.
- Usefulness of linked data for infectious disease events: a systematic review.Epidemiology and infection · 2023Pooled it
- Epidemiological characteristics of patients hospitalized with severe complicated influenza in Taiwan from 2010 to 2020: a retrospective study.BMC infectious diseases · 2026Article
- Factors associated with death due to severe acute respiratory syndrome caused by influenza: Brazilian population study.Journal of infection and public health · 2022Article
- Viral detection profile in children with severe acute respiratory infection.The Brazilian journal of infectious diseases : an official publication of the Brazilian Society of Infectious DiseasesObservational
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2 authors at 1 institution in 1 country.
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Abstract
objectiveTo describe the clinical aspects of cases of influenza A(H1N1)pdm09 in Brazil.
methodsA descriptive study of cases reported in Sistema de Informação de Agravos de Notificação (SINAN), 2009-2010.
resultsAs the final classification, we obtained 53,797 (56.79%) reported cases confirmed as a new influenza virus subtype, and 40,926 (43.21%) cases discarded. Fever was the most common sign, recorded in 99.74% of the confirmed and 98.92% of the discarded cases. Among the confirmed cases, the presence of comorbidities was reported in 32.53%, and in 38.29% of the discarded cases. The case fatality rate was 4.04%; 3,267 pregnant women were confirmed positive for influenza A new viral subtype and 2,730 of them were cured. The case fatality rate of pregnant women was 6.88%.
conclusionThe findings suggested concern of the health system with pregnant women, and patients with comorbidities and quality of care may have favored a lower mortality. We recommend that, when caring for patients with severe respiratory symptoms, with comorbidities, or pregnant women, health professionals should consider the need for hospital care, as these factors make up a worse prognosis of infection by the pandemic influenza virus.
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