A little over half of the new coronavirus cases identified in Devon this week are attributable to the University of Exeter.
Registrar Mike Shore-Nye, said the university's rapid testing system provided results within 24 hours and allowed them to identify positive cases coming into Exeter and ensure individual isolation and support immediately.
He said: "The Public Health teams have made a careful analysis of all of the cases so far and their assessment is that a number of students have arrived from their home towns and cities, carrying the infection with them, and this has been passed on to their close contacts and housemates."
Mr Shore-Nye said there was no evidence of wider community transmission and said while there had "been pictures and reports of young people breaking the rules, the vast majority of our 25,000 students have behaved impeccably".
He added: "I also want us to remember that many of these young people are away from home for the first time and already had a difficult start to adulthood with now further pressures and consequences to face.
"Some will receive sanctions and fines but most deserve our understanding and support."