The Tough Mudder event is leaving people with a lot more than sore muscles.
At least a dozen people and probably many more who attended the competition at Michigan Internatioanl Speedway last weekend are reporting symptoms of norovirus and upper respiratory issues.
The Michigan Department of Community Health is handling the case with the Lenawee County Health Department.
News 10's Shannon Kantner will have the full story on WILX at 6:00.
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