With the semester coming to an end and finals approaching it’s not a great time to be stuck on a toilet or in the hospital. Nearly 50 Michigan State University students are ill, 20 of which are being treated at a local hospital after becoming ill with gastrointestinal illness, reports MSU News.

The type or source of the sickness has not been determined, according to health officials, though it appears it may be foodborne. Gastrointestinal illnesses generally last a day or two, and for most people do not affect long-term health, said University Physician Beth Alexander.

The suspect dining hall where many of the ill students ate has been temporarily closed to prevent farther illnesses. Last year MSU students were spewing after an outbreak of E. coli O157:H7 was linked to bagged lettuce.