Over 50 people, including students and a faculty member, have tested positive for Covid-19 in IIT-Guwahati over the last six days, forcing the authorities to impose restrictions on the campus, an official said on Wednesday.

Almost 99 per cent of the cases were people who returned to the campus from outside Assam after holidays, said Parmeshwar Iyer, Dean-PR, IIT-Guwahati.