U.S. COVID-19 County Community Transmission Levels, Daily Historical Data

Archived historical daily data on COVID 19 community transmission levels for U.S. counties from January 22, 2020, to October 20, 2022. The dataset contains 7 data elements, including case rates and test positivity, aggregated from jurisdictional and state partners by the Centers for Disease Control and Prevention (CDC). This dataset is archived and was last updated on October 20, 2022, when CDC shifted to weekly data retrieval.

Use Cases

• Analyze temporal trends in community_transmission_level and cases_per_100K_7_day_count_change by county_name and date.
• Map transmission risk using fips_code and state_name for geospatial analysis.
• Model the relationship between percent_test_results_reported_positive_last_7_days and cases_per_100K_7_day_count_change.
• Compare transmission levels across different states using state_name and county_name.

Strengths

• Data spans from January 22, 2020, to October 20, 2022, covering the primary phases of the COVID-19 pandemic.
• Includes 7 specific data elements such as fips_code for geographic joins and two key transmission metrics.
• Sourced from the authoritative CDC organization via data.cdc.gov.

Limitations

• The dataset is archived and has not been updated since October 20, 2022.
• Row count and total file size are unknown, which may limit suitability assessment.
• Description metadata is limited; actual data quality requires manual inspection after download.

Provenance

Source

Centers for Disease Control and Prevention (CDC) via data.cdc.gov.

Collection Method

Aggregated daily from jurisdictional and state partners, incorporating historical changes.

Time Range

January 22, 2020 to October 20, 2022.

Freshness

Last updated 2025-02-23 22:55:11; data is archived and static since October 20, 2022.

Geography

United States, county-level.