NEW DELHI : The increase in coronavirus cases in the national capital has prompted institutions of higher education here including the Delhi University (DU) and the Jawaharlal Nehru University (JNU) to take necessary steps to control the spread of the virus on their campuses.While the DU issued guidelines on Saturday advising students to stay at home or their hostels and avoid physical presence for their academic work unless "very essential", the JNU on Sunday made it mandatory for all to wear masks all the time inside the campus.In a notice, the DU said that academic activities and essential works will continue with thermal screening at gates, social distancing and wearing masks mandatorily, while entry inside the Faculty of Science,.