In Michigan , Oakland , Macomb , and Wayne counties all had less than 2,800 cases of coronavirus .
Theories vary on why Detroit is a COVID-19 'hot spot ' Crain 's Detroit Business , March 31 , 2020 Oakland , Macomb , and Wayne counties all have over 2,900 cases each , the latter of which accounts for nearly half the total number of cases and deaths in the state with more than 10,000 .
2020 coronavirus pandemic in Michigan