Universities in New Jersey are reinstating some of their COVID protocols as cases grow.

Officials say nearly 3,600 cases were reported Thursday. The last time the numbers were that high was back in April.

Princeton University announced an increase in asymptomatic testing requirements for undergraduate students.

Undergraduates will now have to take a COVID-19 test twice per week even if they are vaccinated.

Freshman Kasey Shao says she is aware of the threat of COVID and the new variant omicron.

"I think it shows that the university cares about what's going on outside and inside the university," says Shao. "I think they want us to be in person."

Princeton University recently reported 39 confirmed cases, which was a slight increase.

The university is also placing restrictions on some undergraduate gatherings and graduate international travel.

"Undergraduate students departing for personal international or domestic travel between Dec. 6 and the end of the semester should not return to campus until winter session housing opens Jan. 7, 2022," says W. Rochelle Calhoun, vice president for campus life.

Health experts believe it's only a matter of time before omicron is more widely detected.