New Delhi, June 20 -- The number of coronavirus disease (Covid-19) cases in Delhi crossed the 50,000-mark on Friday, with 3,137 new cases over the past 24 hours, as per the city government's daily health bulletin. Friday's surge, the highest in a single day as well, took the city's total to 53,116. The city added over 10,000 cases in five days, with total cases reaching 41,182 on June 14, when Delhi recorded 2,224 cases in a single day....