CLEVES, Ohio (CBS Detroit Local) — An entire school district in Ohio was shut down for two days this week after nearly 600 students called in sick, the district’s superintendent said.

All classes and after school activities at Three Rivers Local School District in Cleves were cancelled for Thursday, Jan. 30 and Friday, Jan. 31. because of a major flu outbreak.

Superintendent Craig Hockenberry said out of nearly 2,400 people who attend or work at three schools on campus, about 600 students and as many as 50 staff members are out sick.

Many of the students have the same symptoms, such as high fever, vomiting and body aches, he told CBS affiliate WKRC.

The closure will allow the custodial staff adequate time to completely disinfect and sanitize the campus.

Hockenberry plans to reopen the district on Feb. 3.