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Just as it looked like Michigan’s positivity rates on coronavirus diagnostic tests might decline, they appear to be gradually picking up.
Statewide, the average seven-day positivity rate is now 13%, down from 12.8% at the end of last week, and 33 counties have a positivity rate of at least 15%, up from 26 a week ago today.
Below is a more in-depth look at the county-level data, based on parameters used by the Michigan Department of Health and Human Services to assess coronavirus risk levels. The scale used by MDHHS has six levels – “low” plus AE levels.
First, a look at the seven-day average positivity rates by county, grouped by state metric.
- Level E (more than 20%): four counties, from highest to lowest – Alcona, Muskegon, Benzie and Arenac.
- Level D (15-20%): 29 counties, highest to lowest – Missaukee, Barry, Berrien, Oceana, Lapeer, Hillsdale, Monroe, Branch, Van Buren, Cass, Baraga, Macomb, Roscommon, Dickinson, Tuscola, Wexford, Allegan, Gogebic, Lake, Osceola, Kalkaska, Oscoda, Bay, Newaygo, Kent, Ogemaw, Livingston, Crawford and Ottawa.
- Level C (10-15%): 30 counties, highest to lowest – Saginaw, St. Clair, Sanilac, Genesee, Ontonagon, Ionia, Lenawee, Mecosta, Iosco, Montmorency, Montcalm, Jackson, Eaton, Huron, Oakland , St Joseph, Shiawassee, Calhoun, Wayne, Kalamazoo, Cheboygan, Gladwin, Grand Traverse, Menominee, Presque Isle, Delta, Antrim, Isabella, Clinton and Ingham.
- Level B (7-10%): 11 counties, highest to lowest – Chippewa, Alpena, Manistee, Marquette, Otsego, Midland, Clare, Charlevoix, Leelanau, Mason and Houghton.
- Level A (3-7%): eight counties – Washtenaw, Emmet, Gratiot, Mackinac, Iron, Keweenaw, Luce and Schoolcraft.
- Low (less than 3%): Algiers.
The table below lets you search for any county by name to see the seven-day average positivity rate from November 21 to 27. (Can’t see the table? Click here.)
The interactive map below shows the seven-day average testing rate by county. If you can’t see the map, click here. You can hover your cursor over a county to see the underlying data.
New cases per capita
Daily new cases per capita is another metric used by the Michigan Department of Health and Human Services to access coronavirus risk.
In this measure – which calculates the average number of new cases per 1 million population – the 83 counties are all at level E, the highest risk level on the MDHHS scale. The threshold for level E is 150 cases per day per million inhabitants.
Here’s an online database that allows readers to see the number of new coronavirus cases in the past seven days compared to the previous week, as well as the number per capita that is adjusting to the population.
Can’t see the graph? Click here.
Current scores are based on new cases reported from November 22 to 28. The map below is shaded based on the six levels of state. Arrows indicate whether the total number of new cases reported in the last seven days has increased or decreased compared to the previous seven days (November 15-21).
Readers can hover their cursor over a county to see the underlying data. If you can’t see the map, click here. (Hint: you can drag the map with your cursor to see all of the TOP)
Overall MDHHS score by region
MDHHS assigned an overall score to each of the state’s MI Start regions, looking at factors such as new cases and deaths per capita, test positivity rates, number of tests administered, and emergency room visits for symptoms of COVID-19.
As of Nov. 4, Michigan’s eight MI Start regions have been at the highest level used by the state to assess coronavirus risk.
This interactive map shows these eight regions and their current scores. You can hover your cursor over a county to see the underlying data.
(The state’s MI Start Districts: Region 1 is the Detroit region; Region 2 is Grand Rapids; Region 3, Kalamazoo; Region 4, Saginaw; Region 5, Lansing; Region 6, Traverse City ; Region 7, Lansing, and Region 8, the Upper Peninsula.)
Below are online databases that allow readers to search county-level data for each of the past 20 days.
Cases daily it was reported to the State
The first is a graph showing new cases reported to the state each day over the past 30 days. This is based on when a confirmed coronavirus test is reported to the state, which means the patient first became ill several days previously.
You can call up a chart for any county, and you can hover your cursor over a bar to see the date and number of cases. (As of September 1, the state stopped reporting numbers on Sunday.)
(In a few cases, a county reported a negative (decrease) number of new daily cases, following a retroactive reclassification by the Michigan Department of Health and Human Services. In these cases, we subtracted the cases of the previous date and put 0 in the reported date field.)
The following graph below shows new cases over the past 30 days based on symptom onset. In this graph, the numbers for the most recent days are incomplete due to the delay between illness and getting a confirmed coronavirus test result, which can take up to a week or more.
You can call up a chart for any county, and you can hover your cursor over a bar to see the date and number of cases.
More localized maps
Below are two maps created by the EpiBayes research group at the University of Michigan’s Department of Epidemiology, which has access to sub-county data collected by the Michigan Department of Health and Human Services.
Interactive maps break down the state into 10-kilometer hexagons to provide a more localized look at coronavirus cases. You can click here to go to the research project website.
The first map examines confirmed and probable cases of coronavirus over the past week. You can click on a hexagon to see the underlying data.
You can use the triangle button at the top right of the map to switch to the second map, which shows the total number of confirmed coronavirus cases and deaths since the start of the pandemic.
Latest daily report
On Saturday, November 28, the state reported 8,080 new cases of coronavirus and 103 new deaths for Sunday and Monday.
The map below shows the total number of confirmed coronavirus cases and deaths since the start of the pandemic. You can hover your cursor over a county to see the underlying numbers.
For more statewide data, visit MLive’s coronavirus data page, here. To find a testing site near you, check out the state’s online test finder, here, email [email protected], or call 888-535-6136 between 8 a.m. and 5 p.m. on weekdays.
For more data on COVID-19 in Michigan, visit https://www.mlive.com/coronavirus/data/.
Learn more about MLive:
Healthy and active 28-year-old Michigan doctor hospitalized with coronavirus
7 myths about the transmission of the coronavirus
6 Michigan hospitals at 100% capacity; 18 more to 90% or more as coronavirus crisis worsens
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