The number of cases in Mumbai is rising, but within that, the number of cases in highrises and building societies is rising much more than in slums or high-density population pockets. Of nearly 11,000 containment zones in Mumbai as of September 27, only 676 were in slums--this number had risen 86% in a month in buildings compared to 0.3% in slums and chawls--whereas the population of the city is roughly divided equally between slums and highrises. Why is this happening? What can this tell us about the behaviour of the disease or the behaviour of people, and the manner in

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