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About
The aim of this study is to determine whether receiving a core letter signed by the Surgeon General or the Director of the National Vaccine Program that provides only information about influenza, or a core letter signed by the Surgeon General with an added basic or enhanced implementation prompt, will increase rates of influenza vaccination among Medicare beneficiaries when compared to a control group.
Enrollment
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Inclusion and exclusion criteria
Medicare fee-for-service beneficiaries aged 66 and older are eligible for study inclusion. There will be no additional exclusion criteria.
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Interventional model
Masking
228,000 participants in 5 patient groups
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Data sourced from clinicaltrials.gov
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