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Am J Infect Control. 2008 May;36(4):301-3. doi: 10.1016/j.ajic.2007.10.019.

A novel approach to improve influenza vaccination rates among health care professionals: a prospective randomized controlled trial.

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Department of General Pediatrics, The Cleveland Clinic Foundation, Cleveland, OH, USA.



Although influenza is the leading infections cause of death in the United States, only 40% of health care workers (HCW) comply with Centers for Disease Control and Prevention recommendation for routine influenza vaccination.


This study investigated a novel approach for improving influenza vaccination rates among HCW. Eight hundred employees we selected, 200 each from the following 4 categories: professional staff, resident physicians, registered nurses, and licensed practical nurses. Subjects were randomly assigned to receive (1) no intervention, (2) a letter explaining the importance of influenza vaccine for HCW, (3) a ticket activated with influenza vaccine administration for a raffle of a free Caribbean vacation for 2, or (4) both the educational letter and the raffle ticket. We compared the proportion of employees receiving vaccination and participating in the raffle across groups.


The influenza vaccination rate for all study subjects was 41%. The number of subjects receiving vaccine did not differ by occupation (P = .87) or intervention group (P = .66).


This study provides no evidence to support the use of mailed educational letters or a single large raffle prize incentive as a means to boost hospital employee influenza vaccination rates.

[Indexed for MEDLINE]

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