Influenza Vaccination Coverage, Adults 65 Years and Older, United States

• Influenza vaccination coverage among Medicare fee-for-service beneficiaries aged ≥65 years is assessed using data files from the Medicare Fee-For-Service (FFS) administrative claims data managed by the Centers for Medicare & Medicaid Services (CMS).
• Weekly influenza vaccination coverage estimates were calculated using Kaplan-Meier survival analysis, based on beneficiaries enrolled as of August 1, 2019 and followed through May 31, 2020 for 2019-20 flu season; and enrolled as of August 1, 2020 and followed through May 31, 2021 for 2020-21 flu season; and enrolled as of Aug 1, 2021 and followed through May 28, 2022 for the 2021-22 flu season and enrolled as of Aug 1, 2022 and followed through December 31, 2022 for the 2022-23 flu season.
• Additional information about data source is available.
• Figure 5. Weekly Cumulative Influenza Vaccination Coverage^*, by Flu Season and Race/Ethnicity, Medicare Fee-For-Service Beneficiaries aged ≥65 years, United States, Data Source: Centers for Medicare & Medicaid Services Chronic Conditions Warehouse.

*Estimates are based on data released by CMS on February 21, 2023. Overall includes persons categorized as ‘Unknown’ for race/ethnicity category.