Why Mumbai's Dharavi is the most dangerous Covid-19 hotspot?

Mumbai's Dharavi which is Asia's biggest slum and the most congested locality in world has continued to cause concerns with six new cases in the past 24 hrs, increasing the total to 28, besides five deaths, according to local civic officials. Since Friday, the government has deployed the State Reserve Police Force (SRPF) in Dharavi to assist the Mumbai Police, besides flying drones to enforce strict lockdown in the region.