COLUMBUS (AP) — Hundreds of positive cases of the new coronavirus are being reported at colleges in Ohio as more students return to campuses, though many of them are doing at least some of their learning online rather than in person.

Ohio State University tallied 882 cases among students during the first two weeks of the semester. It also logged 20 cases among employees in August.

At Miami University, which started classes remotely but saw many students return to the Oxford area anyway, just over 700 student cases and two involving employees were reported. With move-ins for on-campus students scheduled in mid-September and hopes of resuming some in-person learning after that, the school has warned that students who don’t participate in surveillance testing as required may be prohibited from going to classes.

Another 250-plus coronavirus cases have been reported at other campuses around Ohio, spread across at least a dozen public and private colleges.

Republican Gov. Mike DeWine noted the trend in his regular Thursday briefing, saying Ohioans aged 18-22 now account for 35-40 percent of all cases. He pleaded with college students to be careful.

“You can get it and pass it on, and that really is the danger, that it’s passed onto someone who is older, or has a medical problem,” DeWine said.