Reviews of evidence regarding interventions to improve vaccination coverage in children, adolescents, and adults11The names and affiliations of the Task Force members are listed on page v of this supplement and at http://www.thecommunityguide.org22Some of this material was published previously in: Shefer A, Briss P, Rodewald L, et al. Improving immunization coverage rates: an evidence-based review of the literature. Epidemiol Rev 1999;20:96–142.