New Delhi, July 22 -- Around 6.33% of the people tested using rapid antigen kits in Delhi were infected with Covid-19, according to the data by the union health ministry. A total of 336,172 people were tested using the method between June 18-when it was rolled out in Delhi-and July 21, said Rajesh Bhushan, officer on special duty, health ministry, in a press briefing on Tuesday....