A-five-day anti-polio campaign is under way in three districts of Khyber Pakhtunkhwa.According to health department, the second phase of anti-polio campaign was launched today in Dera Ismail Khan, Tank and Lakki Marwat districts.During this phase, over six hundred and seventy-two thousand children up to five years of age will be inoculated. For this purpose, over four thousand and five hundred polio teams have been deputed.The teams will visit door to door to ensure administration of anti-polio drops to each child in the three districts.Strict security measures have been taken for the security of polio teams.Source: Radio Pakistan