COVID-19 Vaccination Coverage by Demographics, Chicago

Weekly cumulative totals of Chicago residents considered up to date with COVID-19 vaccinations, segmented by race-ethnicity, sex, and age group. The data is sourced from the Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE) and uses CDC criteria for defining 'up to date' status, which varies by age and prior vaccination history. This dataset replaces two historical datasets covering vaccinations from December 15, 2020 through September 13, 2023.

Use Cases

• Tracking vaccination coverage trends over time using Week End and MMWR Week columns.
• Analyzing disparities in vaccination rates across demographic groups using Race/Ethnicity, Sex, and Age Group columns.
• Calculating vaccination percentages for specific cohorts using Count and Population Size columns.
• Comparing vaccination progress across different seasons using the Season column.
• Aggregating data for high-level summaries using the 'All' options in demographic columns.

Strengths

• Provides detailed demographic segmentation with columns for Race/Ethnicity, Sex, and Age Group.
• Includes explicit CDC criteria for defining 'up to date' vaccination status, enhancing interpretability.
• Is maintained and updated by the City of Chicago, with a last recorded update in May 2026.
• Replaces and consolidates two historical datasets, suggesting ongoing curation.

Limitations

• Key metadata such as row count, dataset size, license, and author are not provided by any source.
• The description is truncated in all sources ('so care should be'), indicating incomplete documentation.
• Data freshness is uncertain as the last update date (2026-05-28) appears to be a placeholder or future date.

Provenance

Source

City of Chicago, data provided by medical providers via the Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE).

Collection Method

Administrative records from immunization registry.

Time Range

Covers the current vaccination season; historical data from December 15, 2020 through September 13, 2023 is in separate datasets.

Freshness

2026-05-28 04:03:34

Geography

Chicago residents, based on reported address.