Published in Medical Letter on the CDC and FDA, June 21st, 2006
According to a study from Canada and Italy, "Our aim was to review the evidence of efficacy and effectiveness of influenza vaccination of health-care workers in reducing cases of influenza-like illness, influenza, complications from influenza, death from influenza, and death from all causes among the elderly people they care for in institutions. We searched 11 electronic databases in any language and identified two cluster-randomized controlled trials with moderate risk of bias and one cohort study at high risk of bias that addressed our questions."
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