Department of Numbers

Wisconsin COVID-19 Case and Testing Statistics

As of Friday April 03 2020, Wisconsin had 1,912 cases of COVID-19. Over the past week, Wisconsin was finding 153 new cases per day on average and recording 3.4 deaths per day. Data for Wisconsin is provided by the COVID Tracking Project and will be updated daily. The COVID Tracking Project gives Wisconsin a data quality grade of: A

Compare Wisconsin COVID-19 data to other states.

Wisconsin average daily new cases

The chart below shows the trend of new case discovery for Wisconsin. Flattening the curve of new daily cases will help alleviate the burden on hospitals and healthcare workers and help ensure that patients that need critical care can get it.

Note: If testing is insufficient the above curve will underrepresent true case discovery. Nationwide daily testing per million residents is currently 336.1. Reported Wisconsin testing per million residents per day is 252.9. Wisconsin testing may be underreported or insufficient relative to the US as a whole.

Wisconsin average daily deaths

Deaths from COVID-19 are likely better reported than the true number of positive cases. As a result, the trend in average daily deaths from COVID-19 might be a more telling measure of progression through the outbreak than daily average positive cases.

Statistics for positive cases of COVID-19 in Wisconsin

Total Cases and Total Cases per 1M residents are cumulative counts. Daily Positive measures are rolling 7 day averages.

Date Total
Cases
Total
Cases
per 1M
Daily
Positives
(7d Avg)
Daily
Positives
per 1M
(7d Avg)
04/03/20 1,912 328 153 26.2
04/02/20 1,730 297 146 25.1
04/01/20 1,550 266 138 23.7
03/31/20 1,351 232 128 21.9
03/30/20 1,221 210 115 19.8
03/29/20 1,112 191 104 17.8
03/28/20 989 170 101 17.4
03/27/20 842 145 91 15.6
03/26/20 707 121 79 13.5
03/25/20 585 100 68 11.8
03/24/20 457 78 55 9.4
03/23/20 416 71 53 9.1
03/22/20 385 66 50 8.6
03/21/20 281 48 37 6.4
03/20/20 206 35 27 4.6

more history ...

Death statistics for COVID-19 in Wisconsin

Total Deaths and Total Deaths per 1M residents are cumulative counts. Daily Death measures are rolling 7 day averages.

Date Total
Deaths
Total
Deaths
per 1M
Daily
Deaths
(7d Avg)
Daily
Deaths
per 1M
(7d Avg)
04/03/20 37 6.3 3.4 0.6
04/02/20 31 5.3 3.3 0.6
04/01/20 24 4.1 2.4 0.4
03/31/20 16 2.8 1.6 0.3
03/30/20 14 2.4 1.3 0.2
03/29/20 13 2.2 1.3 0.2
03/28/20 13 2.2 1.3 0.2
03/27/20 13 2.2 1.4 0.2
03/26/20 8 1.4 1.1 0.2
03/25/20 7 1.2 1.0 0.2
03/24/20 5 0.9 0.7 0.1
03/23/20 5 0.9 0.7 0.1
03/22/20 4 0.7 0.6 0.1
03/21/20 4 0.7 0.6 0.1
03/20/20 3 0.5 0.4 0.1

more history ...

COVID-19 testing statistics in Wisconsin

All measures below are rolling 7 day averages except Total Tests and Total Tests per 1M residents which are cumulative counts of COVID-19 tests as of the date reported. Testing statistics are dependent on high quality reporting of negative test results by states. I'm only showing this data for states that don't have implausibly low testing rates and that have an A reporting grade from the COVID Tracking Project.

Date Total
Tests
Total
Tests
per 1M
Daily
Tests
(7d Avg)
Daily
Tests
per 1M
(7d Avg)
Daily
Positive
Rate
(7d Avg)
04/03/20 24,289 4,172 1,472 253 10.4%
04/02/20 22,047 3,787 1,394 239 10.5%
04/01/20 20,369 3,498 1,385 238 10.0%
03/31/20 18,726 3,216 1,433 246 8.9%
03/30/20 17,077 2,933 1,373 236 8.4%
03/29/20 17,662 3,033 1,578 271 6.6%
03/28/20 16,221 2,786 1,616 278 6.3%
03/27/20 13,982 2,401 1,474 253 6.2%
03/26/20 12,290 2,111 1,420 244 5.5%
03/25/20 10,674 1,833 1,284 221 5.3%
03/24/20 8,694 1,493 1,083 186 5.1%
03/23/20 7,466 1,282 988 170 5.3%
03/22/20 6,615 1,136 896 154 5.6%
03/21/20 4,909 843 674 116 5.5%
03/20/20 3,661 629 496 85 5.4%

more history ...

A final word on this analysis

In order to manage the outbreak, states need to increase their testing capacity. As testing increases, the number of detections as a fraction of total tests (positive rate) should hopefully decrease over time. If a state is able to test widely enough (at least 300 tests daily per million residents, probably more) to drive the positive rate down (less than 5%) there may be the potential to manage a regional outbreak with isolation, contact tracing and quarantine South Korea has.

Please take my calculations and amatuer epidemiological speculations with a huge grain of salt as I'm moving quickly to get what I hope are meaningful measures online. There may be errors in my data and my thinking!

These statistics were inspired by posts on Calculated Risk and the Bondad Blog regarding metrics to track for COVID-19.

Last but not least, thanks to the folks at COVID Tracking Project for making this data available to everyone.