Monthly Influenza Vaccination Coverage by Age Group and U.S. Jurisdiction

United States monthly cumulative influenza vaccination coverage data for children and adults, aggregated by age group and jurisdiction. Estimates are derived from Immunization Information Systems data submitted by jurisdictions to the CDC. The dataset is updated monthly and covers multiple influenza seasons.

Use Cases

• Analyze monthly trends in vaccination coverage using the `Month` and `Estimate` columns across different `Jurisdiction` and `Age_group_label`.
• Compare cumulative vaccination percentages (`Estimate`) between child and adult populations (`Age_group_label`) for a given `Current Season`.
• Assess the raw count of vaccinated individuals (`Numerator`) against the eligible `Population` to calculate coverage rates for specific jurisdictions.
• Track the progress of vaccination campaigns over the course of a flu season using the cumulative `Month` and `Current Season` fields.

Strengths

• Data is sourced from official Immunization Information Systems submitted to the CDC.
• Provides monthly cumulative estimates allowing for trend analysis within a flu season.

Limitations

• National estimates are not available as not all U.S. jurisdictions report data.
• Sample size, row count, and specific date range are unknown from the provided information.

Provenance

Source

data.cdc.gov

Collection Method

Aggregated from U.S. jurisdictions' Immunization Information Systems data submitted monthly to the CDC.

Time Range

Covers multiple influenza seasons, starting cumulative counts from July 1 each season.

Freshness

Updated monthly; last updated March 2026.

Geography

United States, including states, some localities, and territories.