The final weeks of the U.S. academic year have been disrupted yet again by COVID-19 as universities bring back mask mandates, switch to online classes and scale back large gatherings in response to upticks in coronavirus infections.

Colleges in Washington, D.C., New York, Pennsylvania, Massachusetts, Connecticut and Texas have reimposed a range of virus measures, with Howard University moving to remote learning amid a surge in cases in the nation's capital.

This is the third straight academic year that has been upended by COVID-19, meaning soon-to-be seniors have yet to experience a normal college year.

"I feel like last summer it was everyone was like, 'Oh, this is it. We're nearing the tail end,'" recalled Nina Heller, a junior at American University in Washington D.C., where administrators brought back a mask mandate about a month after lifting it. "And then that didn't quite happen, and now we're here at summer again, and there's kind of no end."

Mandates were shed widely in the wake of spring break as case numbers dropped following a winter surge fueled by the Omicron variant. But several Northeast cities have seen a rise in cases and hospitalizations in recent weeks, as the BA.2 subvariant of the omicron variant continues to spread rapidly throughout the U.S.

(With input from AP)