By A Mystery Man Writer
It still isn't clear what caused the runners to become sick, but health officials are now testing ground samples taken from the race site to determine the cause of the illnesses.
Video Tough Mudder participants fall ill after California race - ABC News
Tough Mudder racers at MIS contracted norovirus from sick participant, health officials say
More than 1000 runners fall ill after French mud race
Valley News, July 15, 2022 by Village News, Inc. - Issuu
1,000 runners get sick with Norovirus after mud run in southeastern French - ABC7 Los Angeles
1,000 runners get sick with Norovirus after mud run in southeastern French - ABC7 Los Angeles
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Tough Mudder racers at MIS contracted norovirus from sick participant, health officials say