The number of cases in the COVID-19 cluster at IIT Madras rose to 171 with another 26 persons testing positive for the infection on Thursday.
Health teams were all set to wrap up saturation testing on the campus of IIT Madras and will focus on symptomatic persons.
After the cluster surfaced on April 19, the department along with the Greater Chennai Corporation took up saturation testing. There are about 7,490 students in the 19 hostels on the campus.