title: Spontaneous reporting of adverse events following pandemic influenza A (H1N1) immunization in a reference center in the State of São Paulo, Brazil.
abstract: BACKGROUND
  This paper describes adverse events (AEs) temporally associated to the pandemic influenza A (H1N1) vaccine observed in a reference center in São Paulo, Brazil, during a 2010 mass vaccination campaign.
  
  
  METHODS
  A retrospective study involving persons who sought medical care for AEs following influenza vaccination. Data were retrieved from medical records, vaccine AE notification forms, and a computerized system for immunobiological registration.
  
  
  RESULTS
  Sixty-six vaccinees sought medical care for AEs after immunization. The most frequent AEs were fever, headache, myalgia, and pain at the injection site. No serious AEs were reported.
  
  
  CONCLUSIONS
  Few vaccinees spontaneously reported AEs to influenza A (H1N1) vaccine at this center.
authors.affiliation: Centro de Referência para Imunobiológicos Especiais, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil.
authors.forename: Danise Senna
authors.initials: DS
authors.lastname: Oliveira
authors.forename: Amanda Nazareth
authors.initials: AN
authors.lastname: Lara
authors.forename: André Machado
authors.initials: AM
authors.lastname: Luiz
authors.forename: Karina Takesaki
authors.initials: KT
authors.lastname: Miyaji
authors.forename: Ana Marli Christovam
authors.initials: AM
authors.lastname: Sartori
authors.forename: Marta Heloísa
authors.initials: MH
authors.lastname: Lopes
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001938:Brazil / Q000453:epidemiology; D002648:Child; D005260:Female; D006801:Humans; D053118:Influenza A Virus, H1N1 Subtype; D007252:Influenza Vaccines / Q000009:adverse effects*; D007251:Influenza, Human / Q000453:epidemiology / Q000517:prevention & control*; D007271:Injections, Intradermal / Q000009:adverse effects; D008297:Male; D032541:Mass Vaccination; D008875:Middle Aged; D058873:Pandemics; D012189:Retrospective Studies; D055815:Young Adult
chemical_list: D007252:Influenza Vaccines