A donut shop at the center of a massive norovirus outbreak in northwest Ohio is about to reopen, but not before more than 200 fell ill. The Toledo-Lucas County Health Department tracked the source of the potentially deadly disease to Mama C’s Donuts in Maumee, and a total of 214 are believed to have fallen ill from norovirus.

Authorities think that those who ate at the store between Friday and Monday were most likely to have fallen ill, and the disease may have spread to a neighboring county. However, Mama C’s employees have cleaned the restaurant from top to bottom and they are now expected to reopen soon.

Norovirus is a nasty illness that causes inflammation of the stomach and intestines. While most people heal in a few days, it can prove fatal for the elderly, the young, and those with compromised immune systems.

The health department got three positives after running some tests at Mama C’s.

“I was texted Sunday morning about 2 a.m. or so that there was something going on. Monday morning, we came in and started the investigation and found out that at this point in time the investigation is looking to Mama C’s,” said Health Commissioner Eric Zgodinski, according to a CBS News report.