A 19-year-old pizza delivery boy who had tested positive for coronavirus last month in Delhi, prompting authorities to put 72 families in home-quarantine, has been discharged from the hospital, officials said Tuesday.All 16 high-risk contacts of the delivery boy, who were all his colleagues, had tested negative in April.”The pizza delivery boy was discharged from the hospital last week. He is doing fine now,” South Delhi District Magistrate BM Mishra told.