Illinois Regional COVID-19 Resurgence Criteria

IDPH is monitoring key indicators to identify early but significant  increases of  COVID-19 transmission in Illinois, potentially signifying resurgence. These indicators are calculated for eleven newly described  Illinois regions. IDPH will monitor if these indicators show an increase in COVID-19 disease burden  with a  simultaneous decrease in hospital capacity OR if there are three consecutive days greater than or equal to 8% test positivity rate (7 day rolling). These indicators can be used to determine whether additional community mitigation interventions are needed for a region to control the further spread of COVID-19.

Indicators are calculated daily for each region based on the most current, complete data. Each indicator is compared to a pre-established threshold value to evaluate the COVID-19 disease burden and hospital resource capacity. By applying the same metrics to each region, IDPH uses a standardized approach to monitor the state as a whole while also monitoring regional trends.

Region 4 Mitigation Measures

Once a region meets resurgence criteria, then mitigation options from a tiered menu will be considered.  If sustained increases in health metrics continue unabated, further mitigations could be added from additional tiers. View the tiered menu of mitigation options here.

Data are provisional and are updated daily. Data updated:  

Region#

 

Test Positivity 7 Day Rolling Average

# Days of Positivity Increases

 

Due to the high volume of COVID-19 testing at University of Illinois at Urbana-Champaign, IDPH is also presenting test positivity data for Region 6 excluding Champaign County. If Region 6 without Champaign County data exceeds the metric threshold, Champaign County will still participate in mitigation along with the other counties in the region.

Test Positivity 7 Day Rolling Average (Excluding Champaign County)

# Days of Positivity Increases

 

Hospital Admissions 7 Day Rolling Average

# Days of Hospital Admission Increases

 

Hospital Availability 3 Day Rolling Average

Med Surg Bed Availability

(20% threshold)

 

 

ICU Bed Availability

(20% threshold)

 

 

IL COVID-19 Regions Methodology

For a comprehensive description of the methodology used for the Illinois Regional COVID-19 Resurgence indicators, refer to the IL COVID-19 Regions Methodology section here.

Test Positivity

Each day, for each region and county, a 7-day test positivity average is calculated by dividing the sum of COVID-19 positive tests for 7 days by the sum of the total COVID-19 tests for the same 7 days, rounded to one decimal place. Whenever the test positivity average (for 7 days) increases from the previous day or is 8% or greater, it is flagged. The data is published online with a three-day lag.

Calculation: 100 x [Sum of positive tests for 7 days] / [Sum of total tests for same 7 days]

Hospital Admissions for COVID-Like Illness (CLI)

Each day, for each region, a 7-day average is calculated by dividing the total number of CLI hospital admissions for 7 days by 7, rounded to a whole number. Whenever the average CLI hospital admissions increases from the previous day, it is flagged. The data is published online with a three-day lag.

Calculation: [Region CLI hospital admissions for 7 days] / 7

Medical/Surgical Beds Percent Availability

Each day, for each region, the sum of the available medical and surgical beds over three days is divided by the sum of the total medical and surgical beds (i.e., bed capacity) over the same period. The data is published online with a three-day lag.

Calculation: 100 x [Sum of medical and surgical beds available in the region for 3 days] / [Sum of total medical and surgical beds in the region for same 3 days]

Intensive Care Unit (ICU) Percent Availability

Each day, for each region, the sum of the available ICU beds over three days is divided by the sum of the total ICU beds (i.e., bed capacity) over the same period. The data is published online with a three-day lag.

Calculation: 100 x [Sum of ICU beds available in the region for 3 days] / [Sum of total ICU beds in the region for same 3 days]

 

 

Region 6 (Excluding Champaign County) Test Positivity