The Union government has rescheduled the national polio vaccination programme from January 17 to January 31 in the wake of phase-I of the Covid-19 inoculation that rolls out in a few days. As is the tradition, the Polio Ravivar (Polio Sunday) drive will be flagged of by President Ramnath Kovind who will administer the "drops" to children at Rashtrapati Bhavan a day before the drive.