Worksite strategies for increasing influenza vaccination rates among industrial employees and dependents

Despite the recommendation for universal influenza vaccination, only 35% of adults were vaccinated in 2010-2011. This program aimed to increase vaccination rates among industrial employees and dependents by customizing educational approaches and expanding worksite access to free vaccine in a setting where approximately 30% of employees were vaccinated. This prospective multisite study utilized a survey to assess employees' experience, knowledge, and beliefs about influenza and vaccination. Results were used to reduce barriers to vaccination and address employees' concerns and misconceptions. The impact of the worksite campaign was evaluated using a follow-up survey, administrative records, and claims data. Participating factories employed a total of 6,511 insured workers (mean age 45 years; 65% male), and 1,000 completed the baseline survey. Influenza-like illness (ILI) frequently occurred (44%), and 31% reported ILI-related absenteeism. Economic factors were more common reasons for receiving vaccine (84% access to free vaccine; 82% preventing lost work; 80% vaccine convenience) than health concerns (62%) or physician recommendations (43%). Concerns and misconceptions about vaccination were common. The educational program did not assuage these concerns or increase knowledge levels. Employee vaccination rates increased significantly at an intervention site that provided convenient vaccine access for both employees and dependents (37% baseline; 51% follow-up). When employees were vaccinated, family members were more than twice as likely to be vaccinated. Convenient access to free vaccine remained the most important driver of vaccination. To reduce the impact of influenza on the workforce, employers should focus on providing convenient access to free vaccine for employees and dependents.