Vaccination coverage among children enrolled in Head Start programs or day care facilities or entering school.

PROBLEM/CONDITION: Undervaccinated children enrolled in day care centers and schools are vulnerable to outbreaks of vaccine-preventable diseases. A Healthy People 2000 objective is to increase to > or = 95% vaccination coverage among children attending licensed day care facilities and kindergarten through postsecondary school (objective 20.11).

REPORTING PERIOD COVERED

September 1997-June 1998.

DESCRIPTION OF SYSTEM

CDC's National Immunization Program administers grants to support 64 vaccination programs. These programs are in all 50 states, eight territories or jurisdictions (American Samoa, Republic of Marshall Islands, Federated States of Micronesia, Guam, Commonwealth of Northern Mariana Islands, Puerto Rico, Republic of Palau, and the U.S. Virgin Islands), five cities (Chicago, Houston, San Antonio, New York City, and Philadelphia), and the District of Columbia. Grant guidelines require annual school vaccination surveys and biennial surveys of Head Start programs and licensed day care facilities. This system constitutes the only source of nationally representative vaccination coverage estimates for these populations.

RESULTS

Head Start Programs: Of the 64 reporting areas, 33 (51.6%) submitted coverage levels for children enrolled in Head Start programs. Of these, all 33 programs reported coverage levels for diphtheria and tetanus toxoids and pertussis vaccine (DTP), diphtheria and tetanus toxoids (DT), or tetanus toxoids (Td), poliovirus vaccine, and measles vaccine; and 32 reported coverage levels for mumps and rubella vaccines. Four programs reported coverage levels for the combined measles, mumps, and rubella vaccine (MMR). The mean vaccination coverage levels for the 1997-98 school year among the reporting vaccination programs were 97.8% for poliovirus vaccine (range: 80.0%-100.0%), 97.0% for DTP/DT/Td (range: 87.7%-100.0%), 93.3% for measles vaccine (range: 91.4%-100.0%), and 93.2% for mumps and rubella vaccines (range: 91.4%-100.0%). Licensed Day Care Facilities: Of the 63 reporting areas with licensed day care facilities, 38 (60.3%) submitted coverage levels for enrolled children. Of these, all 38 programs reported coverage levels for poliovirus vaccine and DTP/DT/Td, 37 reported coverage levels for measles vaccine, and 36 reported coverage levels for mumps and rubella vaccines. Four programs reported coverage levels for the combined MMR. The mean vaccination coverage levels among the reporting areas were 95.8% for poliovirus vaccine (range: 85.1%-99.8%), 95.7% for DTP/DT/Td (range: 77.6%-99.9%), 89.1% for measles vaccine (range: 78.0%-99.9%), and 89.1% for mumps and rubella vaccines (range: 78.0%-99.9%). Kindergarten/First Grade: Of the 64 reporting areas, 43 (67.2%) submitted coverage levels for children enrolled in kindergarten and first grade. Of these 43 programs, 42 reported coverage levels for poliovirus vaccine and DTP/DT/Td, and 43 reported coverage levels for measles, mumps, and rubella vaccines. Four of the 43 programs reported coverage levels for the combined MMR. The mean vaccination coverage levels among the reporting areas were 96.7% for poliovirus vaccine (range: 82.8%-99.9%), 96.7% for DTP/DT/Td (range: 82.8%-99.8%), 96.0% for measles vaccine (range: 82.8%-99.9%), and 96.5% for mumps and rubella vaccines (range: 82.8%-99.9%).

INTERPRETATION

High levels of vaccination coverage among children entering school most likely result from the successful implementation of state-specific school vaccination laws, which have applied to children entering school in all states and the District of Columbia since at least 1990. All states, territories, and the District of Columbia have additional laws that require vaccination of children in licensed day care facilities. However, because a high proportion of states and territories did not submit vaccination coverage reports to CDC, these estimated means may not reflect levels for all children in the United States.