HMO strategies for improving childhood immunization rates.

Last fall, Group Health Association of America (GHAA) surveyed plans that are participating in the Childhood Immunization Program (see p. 29). The 121 HMOs that responded reported on a variety of immunization interventions. The survey is not representative of all HMOs because of the size of the response rate. Nevertheless, the survey provides an interesting snapshot of the immunization tactics that these HMOs are employing.