While India entered into the “Unlock 1.0” stage from June 1 — in a bid to restore normalcy in a phased manner — it is worth evaluating the evolution of the epidemic in the country since the pre-lockdown stage, which passed through four stages. There is no denying that the economy has to be opened up at some point or the other, in a phased manner. The appropriate timing, however, is a complex decision, based on various parameters of the epidemic and the economy. The most important single parameter of the epidemic is R0 (pronounced R-zero or R-nought), which has
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