American journal of preventive medicine
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Underinsurance is a barrier to vaccination among children. Information on vaccination among adults aged ≥18 years by insurance status is limited. This study assesses vaccination coverage among adults aged ≥18 years in the U.S. in 2012 by health insurance status and access to care characteristics. ⋯ Overall, vaccination coverage among adults aged ≥18 years is lower among uninsured populations. Implementation of effective strategies is needed to help improve vaccination coverage among adults aged ≥18 years, especially those without health insurance.