Surveillance of influenza A H1N1 2009 among school children during 2009 and 2010 in São Paulo, Brazil

Surveillance of influenza A H1N1 2009 among school children during 2009 and 2010 in São Paulo, Brazil.

INTRODUCTION Influenza A H1N1 2009 is associated with a high morbidity rate among children around the world, including Brazil. This survey was conducted on samples of symptomatic children (< 12 years) to investigate the influenza virus as the etiological agent of respiratory infections in a day care school in a health facility during the first and second pandemic wave of H1N1 (2009-2010) in São...

Risk Factors for Death from Influenza A(H1N1)pdm09, State of São Paulo, Brazil, 2009

This case-control study aimed to assess the risk factors for death from influenza A(H1N1)pdm09 in patients with laboratory confirmation, who had severe acute respiratory illness-SARI and were hospitalized between June 28th and August 29th 2009, in the metropolitan regions of São Paulo and Campinas, Brazil. Medical charts of all the 193 patients who died (cases) and the 386 randomly selected pat...

Surveillance for influenza A 2009 H1N1 among Thai healthcare workers.

To the Editor—In Thailand, as of June 22, 2009, there were a total of 774 cases of influenza A 2009 HlNl. ' Notably, the majority of cases have occurred among persons who returned from countries with high attack rates and among school-aged children. Although the transmission of influenza A 2009 HlNl in communities is well recognized, limited data are currently available with regard to the poten...

Clinical aspects of influenza A(H1N1)pdm09 cases reported during the pandemic in Brazil, 2009-2010

OBJECTIVE To describe the clinical aspects of cases of influenza A(H1N1)pdm09 in Brazil. METHODS A descriptive study of cases reported in Sistema de Informação de Agravos de Notificação (SINAN), 2009-2010. RESULTS As 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 ...

2009 H1N1 Influenza Virus Seroepidemiology