CDC National Immunization Surveys

CDC National Immunization Surveys
Name	National Immunization Surveys
Agency	Centers for Disease Control and Prevention
Formed	1994
Jurisdiction	United States
Parent agency	National Center for Immunization and Respiratory Diseases

CDC National Immunization Surveys

The National Immunization Surveys are recurring telephone and provider-verified surveillance efforts conducted by the Centers for Disease Control and Prevention to estimate vaccination coverage among children and adolescents in the United States. They produce standardized, population-based estimates used by agencies such as the Advisory Committee on Immunization Practices, the World Health Organization, and the Institute of Medicine to monitor progress toward objectives in programs like Healthy People and initiatives of the Pan American Health Organization. The surveys inform stakeholders from the Department of Health and Human Services to state health departments and academic centers including the Johns Hopkins Bloomberg School of Public Health.

Overview

The National Immunization Surveys were established to measure immunization coverage for key childhood vaccines recommended by the Advisory Committee on Immunization Practices and to assess trends relevant to programs at the Public Health Service, the American Academy of Pediatrics, and state immunization registries such as those coordinated by the Association of Immunization Managers. Operated within the Centers for Disease Control and Prevention and administered with contractors from institutions like Westat and university partners including Emory University, the surveys link household interview data to provider-verified vaccination histories to produce estimates comparable across states, territories, and national surveys used alongside reports from the National Notifiable Diseases Surveillance System and surveys such as the Behavioral Risk Factor Surveillance System.

Methodology

The design employs random-digit-dialing of landline and cellular frames, stratified sampling informed by population controls from the U.S. Census Bureau and weighting adjustments aligned with standards from the National Center for Health Statistics. After household interviews with parents or guardians, vaccination histories are requested from health care providers — a process coordinated through networks including the American Academy of Family Physicians and clinics participating in the Vaccines for Children program. Analytic methods reference survey procedures from the National Health Interview Survey, and variance estimation techniques used by the Bureau of Labor Statistics for complex surveys, with oversight from advisory groups involving representatives from the Kaiser Family Foundation and the Robert Wood Johnson Foundation.

Survey Components and Variants

The program includes multiple components: a childhood survey for ages 19–35 months, an adolescent survey for ages 13–17 years, and supplemental modules on influenza vaccination and parental attitudes that align with instruments used by the National Immunization Program and harmonize with international instruments from the World Health Organization and the Pan American Health Organization. Variants include state and local area estimates implemented in collaboration with state health departments such as the California Department of Public Health, the New York State Department of Health, and the Texas Department of State Health Services, and linked analyses with administrative sources like the Medicaid claims databases and the National Center for Health Statistics immunization-linked birth cohorts.

Key Findings and Coverage Estimates

Results have documented coverage for vaccines recommended by the Advisory Committee on Immunization Practices, including diphtheria-tetanus-pertussis, measles-mumps-rubella, varicella, hepatitis B, human papillomavirus, and influenza. The surveys have tracked milestones relevant to initiatives by the Healthy People objectives, showing differential coverage by sociodemographic factors highlighted in reports used by the Institute of Medicine and policy analyses from the Brookings Institution and the Commonwealth Fund. Findings have been cited in guidance from the American Academy of Pediatrics and in deliberations before the U.S. Congress and inform action by immunization coalitions including the National Foundation for Infectious Diseases.

Data Quality and Limitations

Quality assurance draws on standards from the National Center for Health Statistics and external methodological review from bodies such as the National Academies of Sciences, Engineering, and Medicine. Limitations include nonresponse bias tied to telecommunications coverage patterns documented by the Federal Communications Commission, potential misclassification from provider record availability compared with electronic health records promoted by the Office of the National Coordinator for Health Information Technology, and sampling variability affecting small-area estimates used by state programs like those in Florida and Illinois. Methodological changes over time, such as inclusion of cellular sampling frames and weighting revisions, require comparability adjustments similar to those used in the National Health Interview Survey and reports by the Government Accountability Office.

Uses and Impact on Public Health Policy

Survey outputs inform immunization program planning at the Centers for Disease Control and Prevention, resource allocation within the Department of Health and Human Services, and evaluation of interventions implemented by organizations such as the American Red Cross, school-entry requirements enforced by state legislatures including the California State Legislature and the New York State Legislature, and vaccination campaigns coordinated with partners like the Bill & Melinda Gates Foundation. The data underpin regulatory deliberations at the Food and Drug Administration regarding vaccine recommendations and are used by researchers at institutions such as the Harvard T.H. Chan School of Public Health to study equity, access, and the impact of policy changes on population immunity.

Category:Public health surveillance