Monday, March 15, coronavirus data by Michigan county: State now at 5% positivity rate

Michigan now averages a 5% positivity rate on COVID-19 diagnostic tests.

That’s the highest seven-day average in the state since Jan. 31.

The seven-day average of new cases has also increased. and is now 1,636, up 34% from 1,132 a week ago and the highest seven-day average since February 3.

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Below is a closer look at county-level data, based on two of the measures used by the Michigan Department of Health and Human Services.

First, a look at the seven-day average positivity rates by county, grouped by state metric.

  • Level E (over 20%): Missaukee.
  • Level D (15-20%): Huron and Wexford.
  • Level C (10-15%), nine counties from highest to lowest: St Clair, Kalkaska, Newaygo, Ontonagon, Cass, Cheboygan, Lapeer and Otsego.
  • Tier B (7-10%): 14 counties, highest to lowest — Tuscola, Roscommon, Calhoun, Van Buren, St Joseph, Osceola, Macomb, Midland, Allegan, Sanilac, Hillsdale, Genesee, Kalamazoo and Branch.
  • Tier A (3-7%): 34 counties, highest to lowest — Berrien, Clinton, Monroe, Livingston, Jackson, Wayne, Luce, Ingham, Gladwin, Shiawassee, Ottawa, Crawford, Bay, Eaton, Saginaw, Leelanau, Oakland, Muskegon, Kent, Mason, Grand Traverse, Mecosta, Arenac, Près Isle, Gogebic, Clare, Ogemaw, Barry, Lake, Charlevoix, Lenawee, Oceana, Manistee, Antrim and Montcalm.
  • Low (less than 3%): 23 counties, highest to lowest — Alcona, Emmet, Delta, Keweenaw, Benzie, Isabella, Houghton, Ionia, Menominee, Alpena, Iosco, Dickinson, Washtenaw, Gratiot, Chippewa, Schoolcraft , Baraga, Montmorency, Marquette, Iron, Oscoda, Algiers and Mackinac.

The chart below lets you search for any county by name to see the seven-day average positivity rate from March 6-12. The graph compares the average of the last seven days to the average of the previous week.

The interactive map below shows the seven-day average testing rate by county. You can hover your cursor over a county to see the underlying data.

New cases per capita

New daily cases per capita is another metric used by the Michigan Department of Health and Human Services to access coronavirus risk.

This measure calculates the average number of new cases per 1 million population.

Tiers for each county:

  • Tier E (over 150 cases per million): 33 counties, highest to lowest — Missaukee, Huron, Wexford, Otsego, St. Clair, Sanilac, Calhoun, Cheboygan, Newaygo, Cass, Lapeer, Kalkaska, Monroe, Macomb, St. Joseph, Osceola, Jackson, Tuscola, Roscommon, Midland, Ontonagon, Van Buren, Livingston, Genesee, Saginaw, Berrien, Kalamazoo, Grand Traverse, Wayne, Bay, Allegan, Oakland and Ingham.
  • Level D (70 to 149 cases per million): 30 counties — Lenawee, Leelanau, Clinton, Ottawa, Kent, Keweenaw, Antrim, Hillsdale, Eaton, Shiawassee, Branch, Barry, Washtenaw, Lake, Isabella, Ionia, Benzie, Baraga , Montcalm, Mecosta, Gogebic, Ogemaw, Crawford, Oceana, Delta, Charlevoix, Manistee, Menominee, Mason and Muskegon.
  • Level C (40 to 69 cases per million): Five counties — Houghton, Emmet, Arenac, Iosco, and Près Isle.
  • Level B (20 to 40 cases per million), 10 counties: Gladwin, Oscoda, Marquette, Montmorency, Chippewa, Alpena, Clare, Alcona, Gratiot and Dickinson.
  • Level A (7 to 20 cases per million): Schoolcraft and Iron.
  • Low (less than 7 cases per million): Algiers, Mackinac and Luce.

Here is 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 per capita number that adjusts for population. The arrows indicate whether the total number of new cases reported in the past seven days has increased or decreased from the previous seven days.

Current scores are based on new cases reported from March 7-13. The map below is shaded according to the six levels of the state. The arrows indicate whether the total number of new cases reported over the past seven days has increased or decreased from February 28-March 6.

Readers can hover their cursor over a county to see the underlying data. (Tip: you can drag the map with your cursor to see the whole UP)

Below are online databases that allow readers to search county-level data for each of the past 30 days.

Overall score

Seven of Michigan’s eight MI Start regions are now Level D in the state’s overall risk assessment. The upper peninsula is at level C.

In assigning risk scores, the Michigan Department of Health and Human Services looks 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. The scale used by the MDHHS has six levels — “low” plus the AE levels.

(The state’s MI Start districts: Region 1 is Detroit Area; Region 2 is Grand Rapids; Region 3, Kalamazoo; Region 4, Saginaw; Region 5, Lansing; Region 6, Traverse City Region 7, Jackson and Region 8, Upper Peninsula.)

Cases per day it was reported to the state

The first is a graph showing new cases reported to the state each day for the past 30 days. This is based on when a confirmed coronavirus test is reported to the state, which means the patient first fell ill a few days prior.

You can call up a graph for any county and you can hover your cursor over a bar to see the date and number of cases.

(In a few cases, a county reported a negative (decreasing) number of new daily cases, following retroactive reclassification by the Michigan Department of Health and Human Services. In these cases, we subtracted cases of the previous date and put 0 in the reported date.)

The following table below shows new cases in the past 30 days based on symptom onset. In this chart, numbers for the most recent days are incomplete due to the lag between people getting sick and getting a confirmed coronavirus test result, which can take up to a week or more.

You can call up a graph 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 Department of Epidemiology, which has access to subcounty data collected by the Michigan Department of Health and Human Services.

The interactive maps break the state down into 10 kilometer hexagons to provide a more localized view of where coronavirus cases are occurring. You can click here to access the research project website.

The first map looks at confirmed and probable coronavirus cases 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.

Last daily report

On Saturday, March 13, the state reported 1,659 new coronavirus cases and 38 deaths.

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 numbers behind it.

For more statewide data, visit MLive’s coronavirus data page, here. To find a testing site near you, visit the state’s online test finder, here, email [email protected], or call 888-535-6136 between 8 a.m. and 5 p.m. h on weekdays.

For more data on COVID-19 in Michigan, visit https://www.mlive.com/coronavirus/data/.

Learn more about MLive:

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