Delhi recorded 7,486 new coronavirus cases on Wednesday, taking the infection tally in the city to over 5 lakh, while 131 new fatalities, the highest single-day count till date, pushed the number of deaths to 7,943, authorities said. The new cases came out of over 62,000 tests conducted the previous day, marking a positivity rate of 12.03 per cent amid the festive season and rising pollution in the national capital, according to the latest bulletin issued by the Delhi health department.