Weekly Cumulative Influenza Vaccination Coverage for US Adults

Weekly estimates from April 2021 onward track influenza vaccination coverage among adults 18 years and older in the United States. The data is produced by the CDC's National Immunization Survey-Adult COVID Module (NIS-ACM), providing estimates by demographic groups and geographic levels. Final estimates for prior seasons are available through the CDC's separate FluVaxView platform.

Use Cases

• Tracking weekly vaccination coverage trends over time using Week_Ending, Current_Season_Week_Ending, and ND_Weekly_Estimate.
• Comparing vaccination rates across demographic groups using Demographic_Name, Demographic_Level, and Demographic_Level_Sort.
• Analyzing geographic disparities in coverage using Geographic_Name, Geographic_Level, and Geographic_Sort.
• Assessing estimate precision and statistical significance using 95 CI (%), CI_Half_width_95pct, and Suppression_Flag.
• Filtering data by influenza season and indicator type using Influenza_Season, Season_Sort, Indicator_Label, and Indicator_Category_Label.

Strengths

• Provides weekly granularity for tracking near-real-time trends, as indicated by the Month_Week and Week_Ending columns.
• Includes statistical confidence intervals (95 CI (%)) and unweighted sample counts (n_unweighted) for assessing estimate reliability.
• Data originates from the authoritative U.S. Centers for Disease Control and Prevention (CDC).
• Available on multiple platforms (Socrata, Dataverse), indicating established use and accessibility.

Limitations

• Key metadata is missing or conflicting across sources: row counts, dataset size, and specific license information are not provided.
• The temporal coverage is inferred from the survey start date (April 2021) but an explicit end date or complete time range is not stated.
• One source lists an update date of 2026-02-23, which is a future date and may indicate a metadata error or system artifact.

Provenance

Source

United States Department of Health and Human Services. Centers for Disease Control and Prevention

Collection Method

Survey data from the National Immunization Survey-Adult COVID Module (NIS-ACM).

Time Range

April 2021 onward (survey start date). Exact end date not specified.

Freshness

2026-02-23 16:22:01 (Note: This is a future date and may be erroneous. A prior update was noted on 2024-05-24.)

Geography

United States, with sub-national geographic levels indicated by Geographic_Level and Geographic_Name columns.