More than 2,800 parents on Thursday refused to get their children vaccinated in the Tribal Areas and Khyber Pakhtunkhwa. The polio campaign came to an end in the high-risk union councils of Khyber Pakhtunkhwa and the Tribal Areas. Health department sources said that mostly people of southern districts and Peshawar, Bannu, Kohat, Khyber Agency, FR Peshawar-Kohat refused to get their children vaccinated. Around 18 cases of polio in Khyber Pakhtunkhwa and 45 in the Tribal Areas surfaced during the following year. The district administration issued arrest warrants of just four parents.