A three-day polio immunisation drive kicked off in Khyber Pakhtunkhwa (KP) province on Saturday amid tight security.
A total of 3,287,429 children under the age of five will be administered polio drops in 13 districts of the province during the immunisation campaign.
According to the Polio Monitoring Cell, 8,444 mobile, 863 fixed, 737 transit and 67 roaming teams are taking part in the three-day drive.
The drive will cover Peshawar, Charsadda, Mardan, Nowshera, Swat, Kohat, Bannu, Hangu, Karak, Dera Ismail Khan, Lakki Marwat, Tank, and Torghar districts of the province.
Stringent security measures were adopted for the immunisation drive as militant groups often attack polio teams as they see vaccination campaigns as a cover for espionage.
FATA along with KPK was declared a hub of the virus in Pakistan.
This year, 15 polio cases have been reported from KPK, 11 from FATA, six from Balochistan and four from Sindh.