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

Adults 65+ Flu Vaccination Coverage

Influenza vaccination coverage among Medicare fee-for-service beneficiaries 65 years and older 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 at the start of each flu season (example: Aug 1, 2021) until the end of the current season reporting time period or the end of May the following year for prior seasons (example: May 28, 2022). Influenza vaccines received since August 1 of each season, among adults who were 65 years or older as of the end of the first year of the season (e.g., December 31, 2025, for the 2025-26 season), were included.

Additional information about data source is available.

• Figure 6. Weekly Cumulative Influenza Vaccination Coverage*, by Flu Season and Race and Ethnicity, Medicare Fee-For-Service Beneficiaries aged ≥65 years, United States. Data Source: Centers for Medicare & Medicaid Services Chronic Conditions Warehouse.

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^{*Estimates are based on data released by CMS on May 13th, 2026. Overall includes persons categorized as ‘Unknown’ for race and ethnicity category.}