LOW VACCINATION LEVELS OF US PRESCHOOL AND SCHOOL-AGE-CHILDREN - RETROSPECTIVE ASSESSMENTS OF VACCINATION COVERAGE, 1991-1992

Objective.-To obtain estimates on (1) the percentage of children who w ere up-to-date on the recommended childhood vaccination series, (2) th e percentage of children who were age-appropriately immunized, and (3) coverage levels by individual vaccines. Design.-Vaccination levels we re estimated by conducting retrospective immunization coverage surveys of the school health records of children entering kindergarten or fir st grade in the 1990-1991 or 1991-1992 school year. A multistage clust er survey design was used. Setting.-Survey sites were selected from am ong the 60 largest urban areas in the United States. One small city an d one rural area were selected for comparison. Results.-By their secon d birthday, 11% to 58% (median, 44%) of the children were fully vaccin ated. Stricter measurement criteria lowered coverage levels further. C ompleted series levels at school entry were 71% to 96% (median, 87%). Conclusions.-Vaccination levels at the second birthday were far below the goal for the year 2000. All health providers need to administer va ccines according to the recommended schedule.