As of April 17 the Michigan Department of Health and Human Services has confirmed 43 total measles cases statewide, and identified more than 100 sites of exposure across the state.
The outbreak, which began in mid-March, has resulted in 40 cases in Oakland County, one in Wayne County and one in the City of Detroit.
Additionally, an international traveler was diagnosed with measles following a visit to Washtenaw County, according to the MDHHS.
On the west side of the state, a person with the disease has confirmed to have visited two spots in Grand Rapids and a location in Lansing.
Below is a map of the 104 known locations of possible exposure, since March 8. The measles virus can live for up to two hours in the air where an infected person was present. Click on each dot to see the date of exposure - the newest sites are in dark red.
The incubation period of measles, from exposure to prodrome - an early sign of symptoms - averages 10–12 days. From exposure to rash onset averages 14 days, with a range of 7–21 days.
Symptoms of measles typically begins with high fever, cough, runny nose, and red, watery eyes (conjunctivitis).
