Unfortunately, the university may be correct to require this student to quarantine, assuming he was in contact with that diseased individual. The university should allow him to know who that person was. Maybe it was mistaken identity. Maybe they never were in close proximity.
Think of it this way; would the same university ask this of a student who may have been near somebody with Hepatitis or TB?
Yes, they would.
But they wouldn’t if it were the flu or strep throat.
And in-person classes and life in general do not stop because there are always a few people getting TB or hepatitis.
My daughter is in college with 3 roommates. They all tested positive and got moved into an isolated area. Daughter tested negative. But still had her quarantined in her room. I questioned that but she was okay and didn’t mind. All’s fine now thank goodness.