U.S. Department of Health and Human Services Office of Disease Prevention and Health Promotion

Maintain the vaccination coverage level of 1 dose of the MMR vaccine in children by age 2 years — IID‑03 Data Methodology and Measurement

On this page:  About the National Data  |  Methodology  |  History

About the National Data

Data

Data Source:  National Immunization Survey - Child (NIS-Child), CDC/NCIRD

Baseline: 90.8 percent of children born in 2015 received at least 1 dose of MMR by their 2nd birthday

Target: 90.8 percent

Numerator
Number of children receiving at least 1 dose of the MMR vaccine by age 2 years (prior to the day of the child's 2nd year birthday).
Denominator
Number of children born during a calendar year (estimated from NIS-Child data collected during the subsequent 3 years).
Target-setting method
Maintain the baseline
Target-setting method justification
Maintain baseline was selected because the data were currently at the desired point. Maintaining the baseline is the desired target because vaccination coverage was not expected to change significantly in the next decade. Sustaining 90 percent vaccination coverage has been sufficient to prevent measles outbreaks in the United States.

Methodology

Methodology notes

The National Immunization Survey (NIS) uses a quarterly, random-digit-dialed sample of telephone numbers to reach households with children aged 19–35 months in the 50 states and selected local areas and territories, followed by a mail survey sent to the children's vaccination providers to collect vaccination information. Data are weighted to represent the population of children aged 19–35 months (or of children born during a calendar year), with adjustments for households with multiple telephone lines and mixed telephone use (landline and cellular), household nonresponse, and exclusion of households without telephone service. Beginning in 2011, surveys include landline and cellular telephone households. In 2018, surveys only included cellular telephone households. This measure tracks the proportion of children born during a calendar year receiving, by age two years, at least one dose of the measles, mumps, and rubella vaccine (MMR). The Kaplan-Meier method will be used to account for censoring of vaccination status among children whose vaccination history is unknown after age 19-23 months.

History

Comparable HP2020 objective
Modified, which includes core objectives that are continuing from Healthy People 2020 but underwent a change in measurement.
Changes between HP2020 and HP2030
This objective differs from Healthy People 2020 objective IID-7.4 in that objective IID-7.4 tracked MMR vaccinations among children aged 19 to 35 months, while this objective tracks MMR vaccinations among children by age 2 years and is measured using birth-cohort specific weights.