About our data
All data are laboratory-confirmed cases of COVID-19 that we freeze once a day to verify and ensure that we are reporting accurate information. These numbers are the official state numbers, though counties may report their own totals independent of DHS. Combining the DHS and local totals may result in inaccurate totals.
Data shown below are subject to change. As individual cases are investigated by public health, there may be corrections to the status and details of cases that result in changes to this information.
Deaths must be reported by health care providers, medical examiners/coroners, and recorded by local health departments in order to be counted.
The number of people with negative test results includes only Wisconsin residents who had negative test results reported electronically to DHS. As a result, this number underestimates the total number of Wisconsin residents with negative test results.
Cumulative total and newly reported COVID-19 cases by date confirmed
Percent of COVID-19 cases by hospitalization status
What is a COVID-19 probable case?
A person is counted as a COVID-19 probable case if they are not positive by a confirmatory laboratory test (for example, a test that detects the virus in the nose or throat), but have a combination of other factors. These other factors are symptoms of COVID-19, exposure to COVID-19 (for example, being a contact of someone who has laboratory confirmed COVID-19), or a positive non-confirmatory laboratory test (for example, a blood test that detects antibodies against the virus causing COVID-19).
A detailed surveillance case definition for COVID-19 probable cases (used by public health and not to be used for making diagnostic or clinical decision) is available under Reporting and Surveillance Guidance on the DHS COVID-19 Health Care Providers webpage.
Summary of COVID-19 cases by age group
Percent of COVID-19 cases who are health care workers
Data on COVID-19 cases who are health care workers represents a broad range of occupations in the health care field, including nurses, physicians, surgeons, physician assistants, health care support staff, emergency medical technicians and paramedics, dentists and other dental health workers, and pharmacists.
Percent of COVID-19 cases living in group housing
Long-term care facilities include skilled nursing facilities (nursing homes) and assisted living facilities (community-based residential facilities and residential care apartment complexes).
Group housing facilities include correctional facilities, homeless shelters, dormitories, and group homes.
The data on group housing is unknown at this time for a portion of cases because these data have only been systematically collected since April 8, 2020. However, any COVID cases who were part of an outbreak investigation in a long-term care or other group housing facility prior to April 8 are classified under the appropriate group setting category (and are not included in the unknown category).
Percent of COVID-19 cases by recovery status
The number of patients recovered from COVID-19 is defined as the number of confirmed cases who are currently alive based on Wisconsin state vital records system data and had one or more of the following:
- Documentation of resolved symptoms
- Documentation of release from public health isolation
- 30 days since symptom onset or diagnosis
Active cases include COVID-19 cases who were diagnosed in the last 30 days, are not known to have died, and do not yet meet the definition of having recovered.