Much of the increase in cases has come from Ohio’s prison system, as more tests have come back confirming that inmates and employees are infected.

Overall, the state’s prison system has recorded 2,426 positive results among inmates, the Ohio Department of Rehabilitation and Correction said. That number is 21% of the total confirmed cases in Ohio.

The majority of those cases are at the Marion Correctional Institution, where 1,828 inmates — 73% of the total — have tested positive for the virus, state officials say. The remaining 667 prisoners now are in quarantine. No deaths have been reported among inmates there.