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

Increase the proportion of people who get the flu vaccine every year — IID‑09 Data Methodology and Measurement

This objective is a Leading Health Indicator (LHI). Learn about LHIs.

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

About the National Data

Data

Data Source:  National Health Interview Survey (NHIS), CDC/NCHS

Baseline: 51.6 percent of persons aged 6 months and over were vaccinated against seasonal influenza for the flu season 2019-20

Target: 70.0 percent

Numerator
Number of noninstitutionalized persons aged 6 months and over reported to be vaccinated with influenza vaccine within the past influenza season.
Denominator
Number of noninstitutionalized persons aged 6 months and over at the time of the household interview, for months of interview relevant for each influenza season.
Target-setting method
Maintain consistency with national programs, regulations, policies, or laws
Target-setting method justification
The target was selected to align with Vaccines for Children, Section 1928 of the Social Security Act, Section 317 of the Public Health Service Act, Advisory Committee on Immunization Practices (ACIP) Vaccine Recommendations immunization schedule for children and adults, Immunization Program Operations Manual, and the National Vaccine Advisory Committee Standards for Adult Immunization which used a target-setting method of trend analysis over 13 influenza seasons, conducted separately for children and adults, which indicated the 70 percent target was reasonable for both age groups.

Methodology

Methodology notes

For children, analysis is restricted to interviews completed August through June, and vaccinations received July through May. Kaplan-Meier survival analysis is used to produce the estimates. Vaccination month is imputed when the child was reported to have been vaccinated but was missing the month and/or year of vaccination. For adults, to better assess influenza vaccination coverage for each season, we report coverage restricted to individuals interviewed during August through June, and vaccinated during July through May, using the Kaplan-Meier survival analysis procedure. Vaccination month is imputed when the adult was reported to have been vaccinated but is missing the month and/or year of vaccination. For pregnant women, to assess influenza vaccination coverage for each season, reported coverage is restricted to women interviewed during August through July, and vaccinated during July through March, using the Kaplan-Meier survival analysis procedure. For women not pregnant at time of interview, follow-up time is estimated by assuming that the pregnancy ended at the mid-point between August 1 and the date of interview. Vaccination month is imputed when the woman was reported to have been vaccinated before or during pregnancy but was missing the month and/or year of vaccination.

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 the related Healthy People 2020 objectives in that it is a composite of objectives IID-12.11, IID-12.12, IID-12.13, and IID-12.14, which tracked influenza vaccinations among children aged 6 months to 17 years, noninstitutionalized adults aged 18 years and over, health care personnel, and pregnant women, respectively.