India, April 8 -- Dharamveer Singh, a 44-year-old labour worker, was isolated in his residence in Hanuman Mandir Gully - one of the many cramped lanes in west Delhi's Palam neighbourhood - after he tested positive for Covid-19 last Thursday.

Two days later, his younger brother, Akash, who lives next door, also tested positive. With that, the two houses were clubbed and turned into one of the 3,300-odd "micro" containment zones in the city.

With each Covid-19 wave, the Delhi government has intensified its micro containment strategy. Revenue minister Kailash Gahlot said the efforts to create such zones in the city have yielded positive results, adding that even though Delhi is witnessing a fresh spike in infections, there have been no mas...