Both slum residents as well as those living in high-rises seem to be defying the Brihanmumbai Municipal Corporation's (BMC) orders about containment zones. There are 6,238 sealed buildings in Mumbai with 7.5 lakh people, but this is only on paper.

The residents of these buildings continue to move about unrestricted. There are more than 20,000 active cases in the city, of which more than 80 per cent are from buildings, said BMC officials.