Internet Archive Link
Data was downloaded as an Excel spreadsheet which appeared in the Public Use Datasets section under the Cumulative Data link of Michigan's Coronavirus webpage, under the url https://www.michigan.gov/coronavirus/0,9753,7-406-98163_98173---,00.html.
Cases are aggregated by the date of onset of COVID-19 symptoms, if known, otherwise by laboratory specimen date if known, otherwise by case referral date. Deaths are aggregated by the date of death if known, otherwise by the last date of a change to the case status.
WMU ScholarWorks Citation
Michigan Department of Health & Human Services, "2021-09-27_MichiganOverview_COVIDcounts" (2021). Michigan COVID-19 Confirmed Cases by Date of Onset Data. 116.