Weekly Cumulative Influenza Vaccinations In Pharmacies And Medical Offices

CDC data.cdc.gov provides weekly cumulative estimates of influenza vaccinations administered to adults in retail pharmacies and physicians' medical offices. Estimates are derived from IQVIA prescription claims and medical claims data. The dataset covers multiple influenza seasons and is updated weekly.

Use Cases

• Analyze weekly vaccination trends by `Influenza_Season` and `Age_Group` to assess campaign timing and demographic reach.
• Compare cumulative vaccination volumes between `Setting` types (pharmacy vs. medical office) using the `Cumulative_Doses` column.
• Model the relationship between `MMWR_Week` and `Doses` administered to forecast end-of-season coverage.
• Track geographic vaccination patterns by analyzing `Location_and_Flu_Season_Order` identifiers over time.

Strengths

• Data is updated weekly, providing near-real-time surveillance of vaccination activity.
• Estimates are derived from two distinct, large-scale data sources: IQVIA prescription claims and medical claims.

Limitations

• Data excludes vaccinations administered in workplaces, community locations, long-term care, and public health clinics, creating a partial picture of total uptake.
• Sample size and row count are unknown, making it difficult to assess statistical reliability.

Provenance

Source

data.cdc.gov, based on IQVIA Longitudinal Prescription Claims (LRx) and Medical Claims (Dx).

Collection Method

Projected estimates based on commercial prescription and medical claims data.

Time Range

Covers multiple influenza seasons; specific start date unknown.

Freshness

Weekly updates; last updated March 25, 2026.

Geography

United States.