An Expert Explains: A second wave of Covid-19, and is lockdown the answer?

Large parts of Europe are in a second lockdown as a new wave of infection sweeps through the continent. Cases in the US are smashing new records. But overall numbers in India are falling — for reasons not yet fully clear. What is the way forward, given the cost of lockdowns? In an interview to The Indian Express, Professor Sunetra Gupta, a proponent of herd immunity, weighed in on this and related questions.