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COVID-19 Surveillance Data


As of April 27, 2020:

12,210

Confirmed Cases

501

Deaths*

114

Congregate settings, such as long term care facilities or nursing homes, with one or more confirmed cases

Includes all cases under the jurisdiction of the Cook County Department of Public Health (excludes Chicago, Evanston, Oak Park, Skokie, and Stickney Township). All numbers are provisional and subject to change. This site is best viewed on a desktop device. If you encounter accessibility barriers, please email covidappaccessibility@gmail.com.


*Source: Office of the Medical Examiner of Cook County. For more data on COVID-19 deaths, please visit https://maps.cookcountyil.gov/medexamcovid19/




All rates are calculated with populations from the 2010 United States Census.




Of 12,210 cases reported,* we are aware of 2,782 (22.8%) hospitalized** cases; 805 (6.6%) have been hospitalized in the intensive care unit.


*Based on previous experience with reportable diseases, cases with unknown hospitalization status are more likely to be mild cases.
**Hospitalization status refers to whether cases were ever hospitalized, not current hospitalization status.





Data source: European Centre for Disease Prevention and Control (ECDC), compiled by Our World in Data


Hover over the map or view the data table below for a town’s exact count or rate of COVID-19 cases. Counts smaller than 5 are presented as a range to protect confidentiality; rates are censored and will appear as 'NA'. Areas labeled 'NA' for both counts and rates represent either towns with no cases, or unincorporated areas of Cook County with no residents. For towns that cross county lines, only data for the portion in Cook County is displayed.

*For data on COVID-19 deaths by town, please visit the Cook County Medical Examiner's dashboard

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Health departments have robust surveillance systems in place for tracking influenza-like illness, or ILI, that are used to monitor seasonal influenza epidemics every fall and winter. The definition of ILI is typically fever plus a cough or sore throat. Because these symptoms are similar to those of COVID-19, traditional ILI surveillance metrics might give an idea of how COVID-19 is affecting our community. Currently, visits to emergency departments are high for this time of year. Deaths associated with pneumonia/influenza are also high. However, the percent of laboratory specimens testing positive for flu has dropped dramatically. This pattern suggests influenza-like illness in our community is currently being caused by other respiratory viruses, such as SARS-CoV2.





Includes mortality data for all residents of Cook County, including Chicago. Additional information on data sources can be found in our influenza application.





Includes aggregate data from our influenza sentinel laboratories. Data may include residents outside of suburban Cook. Additional information on data sources can be found in our influenza application.