Abstract
Examples of Bloom's (1968) three methods of effecting primary prevention were utilized in a single community agency to increase community compliance to immunization regimens. A milestone approach which utilized written prompts to parents delivered by school age children and school-based clinics produced large increases in the number of children immunized, with very low cost. A community wide DHEW public service media campaign did not result in an appreciable increase in immunizations obtained, but a community wide measles epidemic and accompanying free clinics also publicized by the media resulted in large increases in the number of individuals immunized. Finally, telephone contact, but not mail contact, with parents of high risk, low socioeconomic status preschool children produced a moderate improvement in immunization status. The implications of each of these specific interventions are considered, including explicit and implicit costs and benefits for the community.

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