Nitish Kumar will never forget the day he and his sisters buried their dead mother in the back garden. Just 32, Priyanka Devi had died from Covid on 3 May. Neighbours and relatives refused to help with her burial, and all the family’s money had gone on hospital fees. The coronavirus pandemic had hit his family, who live in the small village of Madhulata in the deprived Indian state of Bihar, with a tragic double blow. It was his father,...