U.S. COVID-19 Vaccination Coverage by Age and Jurisdiction, 2025-26 Season

CDC data.cdc.gov provides monthly cumulative estimates of persons receiving one or more COVID-19 vaccine doses, comparing the 2025-26 season to previous seasons. The dataset is derived from aggregate Immunization Information Systems (IIS) data submitted by U.S. states, localities, and territories. National estimates are not presented as not all jurisdictions report their IIS data to the CDC.

Use Cases

• Analyze vaccination coverage trends over time using Month, Current_season, and Previous_covid_Season columns.
• Compare vaccination rates between age cohorts using Age_group_label, Numerator, and Population columns.
• Assess jurisdictional differences in vaccine uptake using Jurisdiction, 2025_26_estimate, and Previous_Estimate columns.
• Calculate season-over-season changes in coverage using Difference_indicator and Difference_in_season_estimate columns.

Strengths

• Data is sourced from official U.S. jurisdiction Immunization Information Systems (IIS) submitted to the CDC.
• Includes comparative analysis between the 2025-26 season and previous COVID-19 vaccination seasons.
• Provides granular breakdowns by Age_group_label and Jurisdiction.

Limitations

• Row count is unknown, which may limit suitability assessment.
• National estimates are not presented due to incomplete jurisdiction reporting.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

data.cdc.gov

Collection Method

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

Time Range

Covers the 2025-26 season and previous COVID-19 vaccination seasons, with monthly cumulative data from July 1.

Freshness

Last updated 2026-03-20 17:11:43.

Geography

United States, by jurisdiction (states, some localities, and territories).