COVID-19 Vaccine Coverage Trends
COVID-19 Vaccine Coverage Trends
This webpage displays COVID-19 vaccination data prior to September 13, 2023, and is being maintained for archival purposes.
Please refer to the COVID-19 Vaccination Coverage page to access current vaccine coverage data.
This page shows COVID-19 vaccination trends among Chicagoans over time by different demographic groups. Learn more about what COVID-19 vaccines are recommended for you and your family on the CDC's COVID-19 Vaccines page.
On this page:
More COVID-19 vaccination data:
For more detailed information about the data, including sources and definitions see About The Data.
COVID-19 Vaccination Coverage Over Time
This graph shows the percentages of Chicago residents with each vaccination status over time. Original booster/additional dose refers to people who received an additional monovalent vaccine dose after completing their primary series. This includes first monovalent booster doses and additional doses for people who are immunocompromised. Monovalent vaccines are the first vaccines that were created from the original strain of the virus that causes COVID-19. Updated (bivalent) booster dose refers to people who have received an updated (bivalent) COVID-19 vaccine dose that became available in Fall 2022. Use the filter on the right to see how coverage has changed over time among different demographic groups.
Number of Chicagoans Vaccinated Against COVID-19 Over Time
This graph shows the 7-day rolling average number of Chicago residents who received a first dose of COVID-19 vaccine, completed a primary series, or received a booster/additional dose, or an updated (bivalent) booster dose of vaccine. A rolling average smooths out day-to-day jumps, but still provides current information about vaccine administration. Use the filter on the right to see these trends among different demographic groups.
Vaccine data comes from the Illinois Comprehensive Automated Immunization Registry Exchange (I-CARE), a statewide database of immunization records. I-CARE includes doses administered in Illinois and some doses administered outside of Illinois and reported in I-CARE by Illinois providers. Doses administered by the federal Bureau of Prisons and Department of Defense are not currently reported in I-CARE. The Veterans Health Administration began reporting doses in I-CARE beginning September 2022.
The Chicago Department of Public Health (CDPH) uses the most complete data available to estimate COVID-19 vaccination coverage among Chicagoans, but there are several limitations that impact our estimates. Individuals may receive vaccinations that are not recorded in I-CARE, such as those administered in another state, causing underestimation of individuals with a completed primary series or updated booster. Inconsistencies in records of separate doses administered to the same person, such as slight variations in dates of birth, can result in duplicate first dose records for a person and overestimate of the number of people with at least one dose and underestimate the number of people with a completed primary series or booster dose.
More detailed descriptions of the data and downloadable files are available on the Chicago Data Portal.
Vaccination Status Definitions:
- At Least One Dose: People who’ve received at least one dose of a COVID-19 vaccine, including those with more than one dose.
- Completed Primary Series: People who’ve completed a primary series of COVID-19 vaccinations.
- Original booster/additional dose: People who have received another dose of a monovalent COVID-19 vaccine after being completing their primary series. This includes booster doses and additional doses for people who are immunocompromised. Monovalent vaccines are the first vaccines that were created from the original strain of the virus that causes COVID-19.
- Updated (Bivalent) Booster: People who’ve received at least one updated (bivalent) COVID-19 vaccine dose. Updated bivalent doses became available in Fall 2022 and were created with the original strain of COVID-19 and newer Omicron variant strains.
Coverage estimates by age and race-ethnicity are capped at 99%. Actual counts may exceed population estimates and lead to >100% coverage, especially in small race-ethnicity subgroups of each age group.
Population Estimates:
Unless otherwise specified, population denominators are from the U.S. Census Bureau American Community Survey 1-year estimate for 2019 and can be seen in the Citywide, 2019 row of the Chicago Population Counts dataset.
