The Indian Institute of Technology-Madras has been hit by Covid-19 with 104 people, a majority of them students, testing positive, Tamil Nadu Health Secretary said.

Radhakrishnan said though the results showed a 20 per cent positivity rate, there was no need for concern.

A spokesperson for the institute said all departments and labs have been shut and only about 700 students, mostly research scholars were accommodated in nine hostels.