CEDAR RAPIDS, Iowa (AP) — An on-duty Linn County sheriff’s deputy working at the Linn County Correctional Center in Cedar Rapids has tested positive for COVID-19.

The deputy showed up for work at the center on Thursday evening symptom-free, but left work near the end of his shift when he began displaying symptoms, including a high fever, the sheriff’s office said in a news release Monday. A test for the new coronavirus was administered and the deputy later learned the test was positive.

The infected deputy has been advised to remain in self-isolation until he meets guidelines for returning to work. At the time he became symptomatic, he was assigned duty as a booking and intake deputy.

The sheriff’s office said the deputy did not expose any inmates to the virus, but that 11 coworkers were exposed. Those coworkers will continue to report for duty as long as they remain asymptomatic, the sheriff’s office said.