The increases in Michigan’s coronavirus numbers are escalating.

The state’s seven-day average is up 47% compared to a week ago; the state reported 12,566 new cases in the past seven days compared to 8,864 cases the previous week.

Michigan is now averaging a 5.5% positivity rate on COVID-19 diagnostic tests, up from 4.2% a week ago today. On Sunday, 7.1% of coronavirus test results reported were positive.

Michigan’s coronavirus numbers are going up, but will vaccinations blunt the impact?

Among the state’s most-populated counties, case numbers are up 60% in Oakland in the past seven days compared to the previous week, 59% in Macomb, 53% in Genesee, 49% in Ingham, 38% in Wayne and around 30% in Kent, Ottawa and Kalamazoo counties.

Washtenaw is up only 13% and continues to have a relatively low case rate compared to most of the state.

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

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

  • Level E (over 20%): Missaukee and Huron.
  • Level D (15-20%): Wexford.
  • Level C (10-15%), eight counties highest to lowest: St Clair, Lapeer, Cass, Tuscola, Newaygo, Otsego, Roscommon and Cheboygan.
  • Level B (7-10%): 15 counties, highest to lowest — Macomb, Osceola, Calhoun, Kalkaska, Sanilac, Genesee, Hillsdale, Allegan, Livingston, Van Buren, Clinton, Midland, St Joseph, Kalamazoo and Branch.
  • Level A (3-7%): 33 counties, highest to lowest — Ingham, Wayne, Eaton, Monroe, Berrien, Ontonagon, Luce, Jackson, Leelanau, Bay, Oakland, Gladwin, Ottawa, Crawford, Muskegon, Charlevoix, Saginaw, Mason, Shiawassee, Kent, Mecosta, Grand Traverse, Lake, Arenac, Lenawee, Ogemaw, Oceana, Gogebic, Clare, Barry, Montcalm and Presque Isle.
  • Low (under 3%): 25 counties, highest to lowest — Emmet, Antrim, Delta, Ionia, Houghton, Isabella, Keweenaw, Benzie, Iosco, Manistee, Baraga, Alpena, Menominee, Washtenaw, Dickinson, Gratiot, Chippewa, Alcona, Schoolcraft, Marquette, Iron, Alger, Mackinac, Montmorency and Oscoda.

The chart below allows you to look up any county by name to see the seven-day average positivity rate for March 8-14. The chart compares the average from the past seven days to the average for the previous week.

The interactive map below shows the seven-day average testing rate by county. You can put 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 metric calculates the average number of new cases per 1 million residents.

The levels for each county:

  • Level E (Over 150 cases per million): 38 counties, highest to lowest — Missaukee, Huron, Wexford, St. Clair, Otsego, Sanilac, Calhoun, Roscommon, Cass, Cheboygan, Lapeer, Macomb, Newaygo, Osceola, Tuscola, Monroe, Jackson, Livingston, Ingham, St. Joseph, Leelanau, Genesee, Kalkaska, Wayne, Berrien, Kalamazoo, Bay, Eaton, Antrim, Allegan, Clinton, Saginaw, Midland, Oakland, Grand Traverse, Van Buren and Crawford.
  • Level D (70 to 149 cases per million): 23 counties — Kent, Lenawee, Hillsdale, Ottawa, Keweenaw, Shiawassee, Branch, Charlevoix, Ontonagon, Ionia, Barry, Lake, Washtenaw, Delta, Baraga, Isabella, Mecosta, Montcalm, Muskegon, Ogemaw, Benzie, Gogebic and Oceana.
  • Level C (40 to 69 cases per million): Eight counties — Mason, Emmet, Houghton, Arenac, Menominee, Manistee, Iosco and Gladwin,
  • Level B (20 to 40 cases per million),nine counties: Dickinson, Chippewa, Clare, Oscoda, Marquette, Presque Isle, Montmorency, Alpena and Alcona.
  • Level A (7 to 20 cases per million): Schoolcraft, Gratiot and Iron.
  • Low (Below 7 cases per million): Alger, 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 last seven days has gone up or down compared to the previous seven days.

The current scores are based on new cases reported March 9-15. The map below is shaded based on the state’s six levels. The arrows indicate whether the total number of new cases reported in the last seven days has gone up or down compared to March 2-8.

Readers can put their cursor over a county to see the underlying data. (Hint: You can drag the map with your cursor to see the entire U.P.)

Below are online databases that allow readers to look up county-level data for each of the last 30 days.

Overall score

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

In assigning the risk scores, 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 department visits for COVID-19 symptoms. The scale used by MDHHS has six levels — “low” plus Levels A-E.

(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, Jackson, and Region 8, the Upper Peninsula.)

Cases by day it was reported to the state

First is a chart 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 became sick days before.

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

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

The next chart below shows new cases for the past 30 days based on onset of symptoms. In this chart, numbers for the most recent days are incomplete because of the lag time 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 chart for any county, and you can put 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 University of Michigan’s Department of Epidemiology, which has access to sub-county data collected by the Michigan Department of Health and Human Services.

The interactive maps break down the state into 10 kilometer hexogons to provide more a more localized look at where coronavirus cases are occurring. You can click here to get to the research project website.

The first map looks at confirmed and probable coronavirus cases in the past week. You can click on a hexagon to see the underlying data.

You can use the triangle button at the upper right of the map to toggle to the second map, which shows total confirmed coronavirus cases and deaths since the start of the pandemic.

Latest daily report

On Monday, March 15, the state reported 3,143 new cases of coronavirus and nine deaths for Sunday and Monday.

The map below shows total confirmed coronavirus cases and deaths since the start of the pandemic. You can put 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, send an email to COVID19@michigan.gov, 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/.

Read more on MLive:

Michigan’s coronavirus numbers are going up, but will vaccinations blunt the impact?

No, the Johnson & Johnson coronavirus vaccine is not inferior, Michigan doctors say

COVID brides and industry professionals consider how the pandemic could change future weddings



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