The aim of the study was to determine predictive factors influencing the acceptance of the 2009 A(H1N1) influenza vaccination among hospital workers (HW) in two French cancer centers. A standardized, anonymous, self-administered questionnaire was sent to HW of two cancer centers. The survey response rate was 26.2% (n=506). Main reasons for A(H1N1) vaccination acceptance were "to protect my relatives" (30.3%), "to protect myself" (30.3%). Main reasons for A(H1N1) vaccination refusal were the fear of side effects (43.1%), doubt about the vaccine's efficacy (25.8%). Vaccinated HW were more influenced by the institutional campaign (p<0.001) or colleagues' advice (p<0.001) whereas non-vaccinated HW were influenced by their family physician's advice (p=0.03), personal conviction (p<0.001) or the media (p<0.001). A multivariate analysis revealed age (>35 vs ≤ 35), prior seasonal influenza vaccination, professional category and source of information to be predictive factors of vaccination. Future vaccination campaigns will need to focus on young HW (≤ 35-year old), with no prior influenza vaccination and HW who are in contact with patients and who reported low seasonal influenza vaccination rates.
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