What would instead happen is that students would go on spring break, quite a number of them traveling of town. Some of them would pick up the virus and then it

What would instead happen is that students would go on spring break, quite a number of them traveling of town. Some of them would pick up the virus and then it would spread among the student body over the remainder of the semester. That's a plausible scenario that no university would want. Better to have them go home and stay there.