A three-day anti-polio campaign began in five districts of Khyber Pakhtunkhwa on Monday.

The districts where the campaign will take place include Kohistan, Shangla, Battagram, Abbottabad and Mansehra, Radio Pakistan quoted the Provincial Health Department as saying.

During the campaign, more than half a million children, up to five years of age, will be administered anti-polio drops.

About 3,700 teams have been constituted to visit door-to-door in order to ensure that all children are administered anti-polio drops.

Special security arrangements have also been made to ensure the security of polio teams.