Health officials at the University of Wisconsin wait to see if lab test results confirm their suspicion that norovirus is making students sick.
University officials confirm that 63 students in Sellery Hall in Madison have become sick since early November.
Several dozens additional students have been sickened in sorority and fraternity houses.
The students in this case suffering vomiting and diarrhea.
The health officials say those symptoms last 24-48 hours.
The school has e-mailed UW students, sending them information on how to limit the spread of the illness.