India's Covid-19 tally crosses 78,000-mark; 3,722 cases in 24 hours Bibek Mondal 8:57 PM Tags: Hindustan Times - topnews The health ministry had said on Wednesday that the doubling time of infection has imporved to 12.2 days from 10.9 days. from Hindustan Times - topnews https://bit.ly/2Z1MwtV