The 125,000 slum-dwellers living under a lockdown so strict that drones monitor their moves and alert police if they attempt to leave home are at the heart of India’s push to contain coronavirus. Dharavi is home to an estimated one million people, who eke out a living as factory workers or maids and chauffeurs to the financial capital Mumbai’s well-heeled residents. The severe lockdown imposed in five virus hotspots in the slum since the first cases were reported in early April is a key part of that undertaking.