A coronovirus hotspot, until last month, Dharavi, Asia's largest slum, is turning into a potential success story. Since April, authorities have knocked on around 50,000 doors to measure temperatures and oxygen levels, screened about seven lakh people and set up fever clinics. Those with symptoms were shifted to nearby schools and sports clubs converted into quarantine centres. As a result, fresh daily infections are down a third compared with May and the number of deaths has plummeted in the tenement where 80 residents share one toilet.