Surveillance for Adverse Events Following Influenza Immunization
Active Surveillance of Adverse Events Following Immunization Among Healthcare Workers Immunized With the Influenza Vaccine
Influenza vaccines are continuously modified to adjust to the virus antigenic shifts or drifts, and its safety profile may vary. While generally considered safe, influenza vaccines have been associated in the past with increases in cases of Guillain-Barré syndrome (1976) and with oculorespiratory syndrome in 2001. Last year, with the vaccination against the pH1N1, an increase of allergic-like reactions was observed.
Passive surveillance is collecting notifications of adverse events (AE) on the whole population but the sensitivity of this system is not high and its timeliness is not necessarily optimal. Last year, with the new pandemic Influenza vaccine the investigators piloted a web-based active surveillance of a large number of health care workers (HCW) vaccinated with the new adjuvanted monovalent pH1N1 influenza vaccine (Arepanrix® GSK, Canada). Because healthcare workers (HCW) constituted a well-defined group with general good health and received the Influenza vaccine in priority, this group of people was well suited for monitoring the safety of the influenza vaccine. For this study, 6242 HCW were recruited in three different sites (5183 were from Quebec). A total of 468 events (local reactions, fever, systemic reactions, gastrointestinal and respiratory problems) were reported by 430 HCW. 80% of the HCW recruited completed at least one of the three surveys and 52% responded to all questionnaires. During this surveillance, the investigators didn't have unexpected findings but this active surveillance of adverse events among healthcare workers would have been effective enough to rapidly detect adverse events occurring at a rate ≥ 1 per 200 vaccinees. For this year the investigators want to expand the surveillance to more sites and more participants to be able to detect AE occurring at rates ≥ 1 per 500 vaccinees, and to increase the response rate to all three surveys in participants.
The main objective of this project is to estimate in HCW vaccinated against influenza the frequency of adverse events of sufficient severity to cause work absenteeism or medical consultation.
This year the network will include 5 Canadian hospitals (Quebec City, Vancouver, Toronto, Halifax, + another one ) with a total enrollment of >10 000 HCW. This should allow us to detect AE occurring at a rate of ≥ 1 per 500 vaccinees.
Visão geral do estudo
Status
Condições
Tipo de estudo
Inscrição (Real)
Contactos e Locais
Locais de estudo
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British Columbia
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Vancouver, British Columbia, Canadá
- BC Children's and Women's Hospital, Vancouver
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Vancouver, British Columbia, Canadá
- University of British Columbia,
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Nova Scotia
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Halifax, Nova Scotia, Canadá
- Canadian Center for Vaccinology, Halifax
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Ontario
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Ottawa, Ontario, Canadá
- The Ottawa General Hospital,
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Toronto, Ontario, Canadá
- Mount Sinai Hospital, Toronto
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Quebec
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Québec, Quebec, Canadá, G1V 4V2
- Centre Hospitalier Universitaire de Quebec
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Sherbrooke, Quebec, Canadá
- Centre Hospitalier et Universitaire de Sherbrooke
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Critérios de participação
Critérios de elegibilidade
Idades elegíveis para estudo
Aceita Voluntários Saudáveis
Gêneros Elegíveis para o Estudo
Método de amostragem
População do estudo
Descrição
Inclusion Criteria:
- To be a healthcare worker from one of the seven Canadian Hospitals participating in the Public Health Agency of Canada/Canadian Institutes for Health Research-Influenza Research Network (PCIRN): Quebec City, Toronto, Halifax, Vancouver, Ottawa and Sherbrooke.
- To have been immunized with the influenza vaccine 2010
- To have an email address
- To be 18 years old and older
- To have sign the consent form
Exclusion Criteria:
- Pregnant women
Plano de estudo
Como o estudo é projetado?
Detalhes do projeto
Coortes e Intervenções
Grupo / Coorte |
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BC Children's and Women's Hospital, Vancouver.
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University of British Columbia, Vancouver.
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Health care workers in Halifax
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Health care workers from CHUQ hospitals
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Health care workers from Toronto
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Centre hospitalier et universitaire de Sherbrooke
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The Ottawa General Hospital, Ottawa
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O que o estudo está medindo?
Medidas de resultados primários
Medida de resultado |
Prazo |
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Number of Participants Who Had Experienced a New Health Problem or the Worsening of an Existing Health Condition That Resulted in a Medical Consultation
Prazo: at day 8 and 29
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at day 8 and 29
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Number of Participants Who Had Experienced a New Health Problem or the Worsening of an Existing Health Condition That Resulted in Work Absenteeism.
Prazo: day 8 and 29
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day 8 and 29
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Colaboradores e Investigadores
Patrocinador
Publicações e links úteis
Datas de registro do estudo
Datas Principais do Estudo
Início do estudo
Conclusão Primária (Real)
Conclusão do estudo (Real)
Datas de inscrição no estudo
Enviado pela primeira vez
Enviado pela primeira vez que atendeu aos critérios de CQ
Primeira postagem (Estimativa)
Atualizações de registro de estudo
Última Atualização Postada (Estimativa)
Última atualização enviada que atendeu aos critérios de controle de qualidade
Última verificação
Mais Informações
Termos relacionados a este estudo
Palavras-chave
Termos MeSH relevantes adicionais
Outros números de identificação do estudo
- pcirn-surveillancehcw-1011
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