Establish the habit: influenza vaccination for health care personnel.

Influenza vaccination of health care personnel (HCP) is a patient safety issue, but the national rate is only 42%. Following an intervention in 2006-2007, HCP in a large health system were surveyed. Self-reported influenza vaccination rate was 61.6% overall, did not differ by race, education level, or employment status but was higher for older HCP (> or =50 years; p=.002). In logistic regression, the strongest predictor of vaccination was receiving influenza vaccine the previous year, although other factors were significantly associated for younger and older HCP groups. Establishing the influenza vaccination habit using age-based targeted messages may be the most effective way to increase rates for HCP without mandates.