Bhuma Shrivastava Corinne Gretler And Bibhudatta Pradhan Bloomberg

With India's daily tally of Covid-19 infections surging by records, public health experts worry that a new -- possibly more virulent -- coronavirus variant could be racing through the crowded nation of more than 1.3 billion people.

With India's daily tally of Covid-19 infections surging by records, public health experts worry that a new -- possibly more virulent -- coronavirus variant could be racing through the crowded nation of more than 1.3 billion people.