California County-Level COVID-19 Vaccination Progress

California county-level data tracks daily COVID-19 vaccination progress, including doses administered by manufacturer and population coverage metrics. The dataset likely contains daily snapshots of vaccination counts, booster doses, and eligibility. It is sourced from the California Open Data portal and is associated with a public GitHub repository for indicator tracking.

Use Cases

• Tracking county-level vaccination coverage using `county`, `cumulative_fully_vaccinated`, and `county_pop2020`.
• Analyzing vaccine manufacturer distribution over time using `pfizer_doses`, `moderna_doses`, and `date`.
• Monitoring booster dose uptake across demographics using `cumulative_booster_recip_count` and `bivalent_booster_recip_count`.
• Assessing progress toward 'up-to-date' vaccination status using `up_to_date_count` and `cumulative_up_to_date_count`.
• Calculating daily vaccination rates using `fully_vaccinated`, `partially_vaccinated`, and `total_doses`.

Strengths

• Provides granular, daily-updated data for all 58 California counties.
• Includes detailed breakdowns by vaccine manufacturer (Pfizer, Moderna, Johnson & Johnson) and multiple dose types.
• Contains population denominators (`county_pop2020`) for calculating coverage rates.
• Cross-platform presence on Socrata and Data.gov suggests established use and importance.

Limitations

• Key metadata is missing or conflicting: license is listed as both 'unknown' and 'other-license-specified', and row counts are unavailable.
• The 'last updated' dates are in the future (2026), indicating a potential metadata error affecting trust in freshness.
• The Data.gov source does not list specific column names, creating a documentation gap for that platform.

Provenance

Source

California Open Data (data.ca.gov)

Collection Method

Likely aggregated from county health departments or state immunization information systems.

Freshness

Last updated dates are reported as 2026-04-03 and 2026-04-07, which are implausible future dates, suggesting a metadata error.

Geography

California, United States, at the county level.