The Waukesha County Health Department is trying to determine why more than a dozen high school students are sick.
The victims reported vomiting and diarrhea after the Waukesha North prom.
Some of the sick students didn’t go to the prom that was held at the Brookfield Conference Center last Saturday.
The reports started coming in three or four days later.
Health officials say so far, they don’t know where the sickness originated and there is no precise number of students that have been infected.
