FluVaxView Data Sources

Influenza vaccination coverage data come from a variety of sources, including the National Immunization Survey-Flu (NIS-Flu), National Health Information Survey (NHIS), the Behavioral Risk Factor Surveillance System (BRFSS), the Pregnancy Risk Assessment Monitoring System (PRAMS), the Minimum Data Set (MDS), and Internet panel surveys. Find additional information about these data sources here.


The National Immunization Survey-Flu (NIS-Flu) data are used to assess annual flu vaccination coverage among children 6 months-17 years at the national level, state level, selected local levels, and some in U.S. territories.


The National Health Interview Survey (NHIS) monitors the nation’s health by conducting in-person household interviews on a broad range of health topics, including flu vaccinations received by adults.


The Behavioral Risk Factor Surveillance System (BRFSS) monitors major behavioral risks among adults at the state level and includes questions on health factors related to vaccinations, including yearly questions on flu vaccinations and questions related to place of flu vaccination every third year.


The Pregnancy Risk Assessment Monitoring System (PRAMS) monitors major health issues before, during, and shortly after pregnancy and includes questions about flu vaccinations.

Minimum Data Set

The Centers for Medicare & Medicaid Services (CMS) Minimum Data Setexternal icon provides a screening and assessment tool for the comprehensive assessment of all residents in Medicare and Medicaid-certified long-term care facilities.

Internet Panel Surveys

CDC uses Internet panel surveys to monitor health issues of special populations, including pregnant women and healthcare personnel. Internet panel surveys include questions related to attitudes about vaccination, health factors related to vaccinations, and flu vaccinations.

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