New Delhi, July 4 -- It is largely quiet at the local community hall in Sarita Vihar's Block A, one of Delhi's 445 containment zones, as people queue up for a 30-minute test that will determine whether they picked up the Sars-Cov-2 virus. Outside, all businesses are shut and access to the neighbourhood of around 750 families is extremely restricted - as is the exit. In a sudden flutter of activity, officials in bodysuits gather around and ask people to spread out as a woman, in her mid-thirties, finds out she is positive, almost breaks down....