In many low-income communities, children are not properly immunized and are left vulnerable to completely preventable illnesses. This report provides information gained as a result of a 1-year funding project in the Chicago area to determine why so many children were not being immunized and how to increase immunization rates. The project tested 5 strategies in 12 programs: (1) educating health care providers about improving immunization rates in their communities, and addressing current delivery and cost issues; (2) educating parents and improving access in low-income and immigrant communities; (3) improving access; (4) improving immunization services at traditional and non-traditional sites; and (5) engaging in a public education campaign to raise awareness. The project found that success depends on partnerships among parents, clinics, government agencies, community-based not-for-profit organizations and coalitions, social service agencies, and universities. Results also indicated the importance of making prevention a priority. The report presents summaries of the 12 funded programs, lists the barriers found in the site communities, reviews program outcomes, and provides recommendations for improving the immunization rates in low-income communities. The report concludes with a summary of the grantee findings and a contact list. (SD)