Today’s data paints another grim picture. Cases in the Suburban Cook County and the State continue to surge, test positivity rates continue to rise, hospitalizations continue to surge, and deaths continue to increase.

When asked today if he would impose another stay-at-home order to contain the spread of the virus, Governor JB Pritzker said, “We are not currently considering a stay-at-home order for the State of Illinois. Obviously, it’s something that other countries are moving forward with because of the rate of infection there.”

He said the State has a plan under which Tier 1, Tier 2, or Tier 3 mitigations may be imposed in specific Regions of the State if the Region meets certain risk factors. Most Regions are now subject to Tier 1 mitigations and one is subject to Tier 2 mitigations. “I think we have pretty good mitigations with tier 1, tier 2, and tier 3,” he said.

Under the Tier 1 mitigations that are now in effect in most of the State, drinking and dining indoors in bars and restaurants is prohibited. A number of elected officials have opposed the restrictions as have many owners of bars and restaurants who say the mitigations will push them to permanently close their doors.

EVANSTON: 23 New COVID-19 Cases

There were 23 new confirmed COVID-19 cases of Evanston residents today. The average number of new cases per day in the last seven days is 17.6. There has been a total of 1,460 cases of Evanston residents, 282 of which are active. The above chart shows the recent trend.

In the last 7 days, there were a total of 123 new COVID-19 cases of Evanstonians. That equates to about 164 new cases per 100,000 people in the 7-day period. The State’s 7-day target is 50 per 100,000.

The test positivity rate over the last 7 days is still relatively low at 2.9%.

One Evanston resident died of COVID-19 in the last 24 hours. The total number of Evanstonians who have died due to the virus remains at 75. There have been 4 deaths since July 11.

The Impact of NU on Evanston’s Increase in Cases

All Northwestern University (NU) students, staff and faculty who live in Evanston and who test positive for COVID-19 are included in the case numbers reported above. If NU students, staff or faculty live outside Evanston, they are not included. [1]

Northwestern University has posted data on its website reporting that between Oct. 23 and Oct. 29 (the latest period for which data is available) there were 58 new confirmed COVID-19 cases of students, staff and faculty, which includes those who live outside of Evanston.  The test positive rate for NU students, staff and faculty is 1.07%.

SUBURBAN COOK COUNTY: Criteria Being Used by School Districts 65 and 202

The Illinois Department of Public Health has adopted Metrics for School Determination of Community Spread to assist leaders of school districts decide whether to open their schools. The metrics all relate to how well a Region is doing in managing and suppressing the pandemic.

School Districts 65 and 202 are in Region 10, which is Suburban Cook County. 

First, New Cases per 100,000 Population. IDPH’s target is that there be fewer than 50 new COVID-19 cases per 100,000 people in Suburban Cook County in a 7-day period. This criterion measures the level of contagion in Suburban Cook County and whether it is at a level that can be contained and suppressed. [2]

On Oct. 30 there were 293 new COVID-19 cases per 100,000 people in Suburban Cook County in a 7-day period, well above the target of 50 cases. This is an increase from 91 on Oct. 1. The first chart in the chart box shows the trend. [3}

Second, a Test Positivity Rate. IDPH’s target is that the test positivity rate be 5% or less, although some experts say it should be 3% or less.  If a community’s test positivity rate is high, it suggests that the community is not testing enough and not locating people who have milder or asymptomatic cases and who may be spreading the virus. [4]

The 7-day test positivity rate of Suburban Cook County as of Oct. 27 was 8.6%. On October 1, it was 5.2%. A chart in the chart box shows the trend.

Third, New COVID-19 Cases in a Week. This criterion looks at the trend, and whether the number of COVID-19 cases is increasing in Suburban Cook County or decreasing.  IDPH’s target is that the total number of new cases in the most recent 7-day period in Suburban Cook County should be decreasing or stable compared to the total number of cases in the prior 7-day period.

The data shows that there were 7,250 new COVID-19 cases in Suburban Cook County in the 7-day period Oct. 24 – Oct. 30.

There were 5,133 new cases in Suburban Cook County in the prior 7-day period Oct. 17 – Oct. 23.

Between the two 7-day periods the number of cases increased by 2,177 cases, or by 42%. IDPH deems an increase of 20% or more as “substantial.”

A chart in the chart box shows the trend.

Fourth, Hospital Admissions and Surge Capacity.

The 7-day average of new hospitalizations due to COVID-19 in Suburban Cook County was 59 on Oct. 27 (the most recent day for which data is available). The number is up from 24 on Sept. 1.

IDPH reported that as of Oct. 30, Suburban Cook County has a surplus capacity of 23% of medical/surgical beds and 28% of ICU beds. This is one of the lowest capacities in last two months. IDPH’s target is 20% surplus capacity, so the target is met.

STATE OF ILLINOIS: New Cases, Positivity Rate, and Hospitalizations

New Cases: In the State there were 6,943 new cases reported today, which sets the record for new cases in a single day.

The current 7-day average of new cases per day is 5,481, which sets yet another record for the highest 7-day average during the entire pandemic.

For purposes of comparison, the average of new cases per day over the seven days ending on May 1 was 2,565, which was the previous high for the State, until the increases in the last several weeks. One of the lowest was 596 cases for the seven days ending June 16.

The trends for the State are shown in the fourth chart in the chart box.

The number of deaths in Illinois due to COVID-19 increased by 36 in the last 24 hours. This brings the total number of deaths due to COVID-19 in Illinois to 9,711. 

Hospitalizations: On a Statewide basis, the number of hospitalizations due to COVID-19 was 3,072 as of midnight on Oct. 29. This is up from 1,596 on Sept. 1. The fifth chart in the chart box shows the trend.

For purposes of comparison, the highest number of hospitalizations due to COVID-19 was 4,868 on May 6.

The number of patients using ICU beds is 673, up from 347 on Sept. 1.

Test Positive Rate: On a Statewide basis, the 7-day test positive rate today is 7.3%, which is an increase from a low of 2.2% on July 8. [4]

Number of Tests: The average number of tests per day in the last seven days is 74,838. This is substantially higher than HGHI’s mitigation level testing target of 19,116 per day, and it is higher than HGHI’s suppression level testing target of 68,211 per day. [5].

The number of new tests reported today was 95,111, a record for the State. Starting Oct. 15, IDPH began including antigen tests in its tally of COVID-19 tests. [6] The plan to administer 3 million antigen tests before the end of this year.

Delays in Getting Test Results: Public health experts convened by HGHI and Edmond J. Safra Center say test results should be obtained within 24 hours.

Gov. Pritzker said on Oct. 23 that the turn-around time for many tests administered at State run testing sites is two or three days.

A saliva test developed at the University of Illinois can produce results in 3 to 6 hours, and it is being used at U of I, Champaign. [6]  Gov. Pritzker said the plan is to expand this method of testing across the State, especially to other college campuses.

The new antigen tests being distributed by IDPH can generate results in 15 minutes.

Contact Tracing: Widespread contact tracing is also essential to control the spread of the COVID-19 virus.

Dr. Ezike said on Oct. 29 that as the number of new cases surge, contact tracers are “being stretched very thin, even as we bring the new contact tracers onboard.” She encouraged people to cooperate with contact tracers.

IDPH does not report the percentage of cases for which contact tracing begins within 24 hours.

…………………………….

FOOTNOTES

1/ Northwestern University Covid-19 Cases. Ike C. Ogbo, Director of Evanston’s Health & Human Services Department, told the RoundTable that the COVID-19 cases reported by the City include cases of faculty, staff and students attending Northwestern University who live in Evanston. The RoundTable asked the City in an FOIA Request to provide the number of NU students who tested positive for COVID-19 and who live in Evanston. The City refused to provide the data. On Oct. 26, the RoundTable appealed the City’s decision to the Public Access Counselor of the Attorney General’s Office.

The RoundTable has asked Northwestern University on two occasions to provide information breaking out the number of new COVID-19 cases of its faculty, staff and students by residency in Evanston. NU did not respond to either request.

 [2] Number of Cases per 100,000 Population. On July 1, a network of research, policy and public health experts convened by Harvard’s Global Health Institute and Edmond J. Safra Center published a Key Metrics for COVID Suppression framework that provides guidance to policy makers and the public on how to target and suppress COVID-19 more effectively across the nation. The targets for new Covid-19 cases per 100,000 people are as follows (these are converted from cases per day to cases per week): a) less than 7 cases: “on track for containment;” b) 7 to 63 cases: “community spread,” rigorous test and trace program advised; c) 70 to 168 cases: “accelerated spread,” stay-at-home orders and/or rigorous test and trace programs advised; and d) 169+: tipping point,” stay-at-home orders necessary. 

IDPH provides these categories and ratings: 1) “minimal” – less than 50 cases per 100,000 in a week; 2) “moderate” – between 50 and 100 cases per week; and 3) more than 100 cases per 100,000 in a week.

3/ Calculating Cases per 100,000 Population for Suburban Cook County. Using data compiled from IDPH’s website, the RoundTable has computed the total number of new COVID-19 cases in Suburban Cook County for each 7-day period ending on days between Sept. 13 and Sept. 30. The RoundTable then computed the number of COVID cases per 100,000 people in Suburban Cook County using a population of 2,469,662.

4/ The Test Positivity Rate. On May 26, Johns Hopkins University & Medicine Coronavirus Resource Center said on its website that “the World Health Organization (WHO) advised governments [on May 15] that before reopening, rates of positivity in testing (i.e., out of all tests conducted, how many came back positive for COVID-19) should remain at 5% or lower for at least 14 days.”

Johns Hopkins explains, “The rate of positivity is an important indicator, because it can provide insights into whether a community is conducting enough testing to find cases. If a community’s positivity is high, it suggests that that community may largely be testing the sickest patients and possibly missing milder or asymptomatic cases. A lower positivity may indicate that a community is including in its testing patients with milder or no symptoms.”  Link: https://coronavirus.jhu.edu/testing/testing-positivity

 The Harvard Global Health Institute (HGHI) says, “A network of research, policy, and public health organizations convened by Harvard and MIT called the TTSI Collaborative has agreed on a 3% test positive rate or below as a key indicator of progress towards suppression level testing. This targets broad and accessible testing for symptomatic and asymptomatic people. Out of the positive tests that do not come from hotspot testing, at least 80% should come from contact tracing.”

While stating the test positivity target is 5% or less, IDPH provides these categories and ratings: 1) “Minimal” – test positivity rate is equal to or less than 5%: 2) “Moderate” – test positivity rate is between 5% and 8%; and 3) “Substantial” – test positivity rate is over 8%.

5/ How Much Testing Should be Done.  The Harvard Global Health Institute posted a paper, “July 6, 2020/State Testing Targets,” in which it published testing targets in collaboration with NPR and also explained “how we can  best use testing targets not as an ultimate goal but as a tool on the path to zero cases.” HGHI said, “And we have begun to work closely with the Safra Center for Ethics at Harvard and other researchers, public health and policy experts across the U.S. to align on key aspects of what we think is needed to get the nation back on track.

“Five months into this pandemic, what we need more than ever is still a robust testing, tracing and supported isolation infrastructure, combined with various measures of social distancing, mask wearing and hand washing. We have made some progress, but not nearly enough. Unsurprisingly, new daily cases are reaching record highs, and getting ahead of this virus seems all but impossible.”

HGHI published two targets for testing for each state: one for what it calls “mitigation” level of testing, and second for what it calls a “suppression” level of testing.

The targets for Illinois are 19,116 tests per day to meet a mitigation level of testing, and 68,211 tests a day to meet a suppression level of testing.

Mitigation Level Testing: HGHI says for mitigation level testing, “The focus is on reducing the spread of the virus through broad testing of symptomatic people, tracing and testing a recommended 10 contacts per new case and isolating positive contacts, and social distancing, mask wearing or stay-at-home orders as necessary. 

“There is a challenge with this approach: As states open up, mitigation level testing is often not sufficient to prevent new outbreaks.

“With strict social distancing orders in place, cases go down, but then spike back up again as a state loosens restrictions. It’s a rollercoaster of recurring outbreaks that creates great uncertainty, for example around reopening businesses, schools, and other vital parts of the economy.”

Suppression Level Testing: HGHI says, “Suppression level testing allows a state or community to quickly find and isolate new cases before they lead to a wider outbreak, with an aim of keeping new case levels at or near zero.

“This requires large, proactive testing — including regular testing of asymptomatic people in high-risk environments such as nursing homes, colleges, and parts of the service industry — paired with rapid contact tracing and supported isolation (TTSI), as well as other measures. Several states are working hard to build and maintain this type of response, including Massachusetts, New York and Connecticut.  

 “Suppression level TTSI programs reduce uncertainty and allow life to return to something closer to normal — but still include mask-wearing, social distancing, handwashing and other measures. It is easier to do when case counts are relatively low or on the decline.”

Link to HGHI’s report: https://globalepidemics.org/july-6-2020-state-testing-targets/

Link to NPR’s article: https://www.npr.org/sections/health-shots/2020/06/30/883703403/as-coronavirus-surges-how-much-testing-does-your-state-need-to-subdue-the-virus

6/ Antigen Tests. The Illinois Department of Public Health announced on Oct. 15 that is including both molecular and antigen tests in the number of statewide total test performed in Illinois. “Previously, due to the limited number of antigen tests and limited information about antigen test accuracy, antigen tests were not included in the total number (which comprised less than 1% of total tests performed). Antigen tests, like BinaxNOW, are now becoming more readily available, therefore, IDPH will include both molecular and antigen tests in its total number of tests starting October 15, 2020. 

Dr. Michael Mina, assistant professor of epidemiology and assistant professor of immunology and infectious diseases at the Harvard T. H. Chan School of Public Health, said an antigen test detects if there is an antigen which is one of the proteins in the virus, while the PCR test looks for the RNA of the virus. He said the initial rapid antigen tests would largely only detect people during their window when they are likely to be transmitting the virus.

7/  Saliva-based Tests. On Aug. 19, the University of Illinois received emergency use authorization from the Food and Drug Administration to run a saliva-based COVID-19 test. “The saliva test is less expensive, faster, and requires significantly less raw materials than traditional testing,” said Gov. JB Pritzker. “If ongoing research continues to yield positive results, this has potentially game changing implications for our State-wide testing complex as well as for testing on a national level, particularly for our high risk communities and settings.

“This type of scalable product would allow us to mass deploy testing, and better track and contain the spread of COVID-19. We’re already working to deploy this to more public universities across the State over the next weeks and months and exploring rolling this out to do testing potentially for K-12 schools and even more testing at our long-term care facilities,” said the Governor.

Dr. Martin Burke, who put the research team together that developed the test, said that in a trial run in July, they were able to get “very fast test results, in many cases in 3 to 6 hours,” which enabled them to rapidly isolate people who were infected with the virus and to contact trace. They were able to reduce the test positivity rate from 1.5% to 0.2% during the month, he said.

Dr. Burke said “speed is the key.” The test is “very well suited to scalability” and the cost is about $10 a test. He added that the University has capacity to administer 20,000 tests a day.

Link:  https://evanstonroundtable.com/Content/City-News/City-News/Article/Illinois-rapid-saliva-test-for-COVID-19-now-operating-under-FDA-Emergency-Use-Authorization/15/26/18440