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    • This is a Non-Federal dataset covered by different Terms of Use than Data.gov.

    COVID-19 Daily Testing - By Test - Historical

    Metadata Updated: February 22, 2026

    NOTE: This dataset has been retired and marked as historical-only.

    This dataset contains counts of unique tests and results for COVID-19. This dataset differs from https://data.cityofchicago.org/d/t4hh-4ku9 in that each person is in that dataset only once, even if tested multiple times. In this dataset, each test is counted, even if multiple tests are performed on the same person, although a person should not appear in this dataset more than once on the same day unless he/she had both a positive and not-positive test.

    The positivity rate displayed in this dataset uses the method most commonly used by other jurisdictions in the United States.

    Only Chicago residents are included based on the home address as provided by the medical provider.

    Molecular (PCR) and antigen tests received through electronic lab reporting are included. Individuals may be tested multiple times. Tests are counted on the day the specimen was collected. A small number of tests collected prior to 3/1/2020 are not included in the table.

    Not-positive lab results include negative results, invalid results, and tests not performed due to improper collection. Chicago Department of Public Health (CDPH) does not receive all not-positive results.

    All data are provisional and subject to change. Information is updated as additional details are received.

    Data Source: Illinois Department of Public Health Electronic Lab Reports

    Access & Use Information

    Public: This dataset is intended for public access and use. Non-Federal: This dataset is covered by different Terms of Use than Data.gov. License: No license information was provided.

    Downloads & Resources

    Dates

    Metadata Created Date November 10, 2020
    Metadata Updated Date February 22, 2026

    Metadata Source

    Harvested from Chicago JSON

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date November 10, 2020
    Metadata Updated Date February 22, 2026
    Publisher data.cityofchicago.org
    Maintainer
    Identifier https://data.cityofchicago.org/api/views/gkdw-2tgv
    Data First Published 2020-10-30
    Data Last Modified 2026-02-19
    Category Health & Human Services
    Public Access Level public
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://data.cityofchicago.org/data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id 4c1d1845-755d-4cbe-91cc-439b33186288
    Harvest Source Id 7590e386-229e-453a-8e53-6f18e200e421
    Harvest Source Title Chicago JSON
    Homepage URL https://data.cityofchicago.org/d/gkdw-2tgv
    Source Datajson Identifier True
    Source Hash 5d598c67882cd9f4dddafc0d26ae69fb5a4e7f155857bd0dd41bf0519673f878
    Source Schema Version 1.1

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