"Many countries are now reporting data which indicate high access to immunization services (good BCG, DPT1, and 0PV1 rates) but lower complete coverage, due to dropouts. Dropouts reflect a problem in one or both of two areas: service barriers (such as missed opportunities to vaccinate); and consumer barriers (such as lack of correct information, fear of side effects, or competing belief systems). In other countries immunization program mangers are discovering that it is more difficult to achieve and maintain the final ten percent or 20 percent of coverage than it was to achieve the initial 60 percent or even 80 percent. In each of these cases communication has a role to play. Communication offers practical strategies for reducing both service and consumer barriers to complete coverage and for sustaining appropriate immunization behavior among these groups over the long term." (Abstract)