Ecological study on mortality from influenza and pneumonia before and after influenza vaccination in the Northeast and South of Brazil

Cadernos de Saúde Pública

Janessa De Fátima Morgado De Oliveira¹  Antonio Fernando Boing²  Eliseu Alves Waldman¹  José Leopoldo Ferreira Antunes¹ 

[1] ,Universidade de São Paulo Faculdade de Saúde Pública São Paulo,Brasil

关键词: Human Influenza;    Respiratory Tract Diseases;    Vaccination;    Sazonal Variation;    Influenza Humana;    Doenças Respiratórias;    Vacinação;    Variações Sazonais;    Gripe Humana;    Enfermedades Respiratórias;    Vacunación;    Variaciones Estacionales;   

DOI  :  10.1590/0102-311X00028413

来源: SciELO

【 摘 要 】

The study compared mortality from influenza and pneumonia in elderly people (65 years or older) before and since implementation of influenza vaccination in the South and Northeast regions of Brazil. Official population and mortality data were retrieved from government agencies to estimate weekly mortality rates. The Serfling model was used to identify influenza outbreaks and estimate the mortality attributable to them. In the South, the vaccination period showed a major reduction in mortality from influenza and pneumonia and in the number and duration of influenza outbreaks. These results were interpreted as consistent with the hypothesis of the vaccination program's effectiveness. In the Northeast, there was an increase in mortality from influenza and pneumonia during vaccination, which was associated with a quality improvement in recording causes of death in the elderly. An increase was also seen in mortality attributable to influenza outbreaks, suggesting a mismatch between the period in which vaccination is conducted and the relevant climatic characteristics for influenza transmission.

【 授权许可】

CC BY   
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