New Polio Case Underscores Ongoing Risk in South Khyber Pakhtunkhwa

A further wild poliovirus case confirmed in southern Khyber Pakhtunkhwa reinforced what has become the central fact of Pakistan's eradication effort: the national outcome is being decided in a small corridor of districts.

The corridor

Southern KP covers Bannu, North and South Waziristan, Dera Ismail Khan, Lakki Marwat and Tank. Together these districts have produced a share of Pakistan's cases far out of proportion to their population. Of the four cases Pakistan reported in 2026 up to September, three came from the Bannu division.

Why this corridor and not others

The distinguishing factor is not poverty, density or sanitation — other parts of Pakistan score worse on all three. It is access.

Security conditions repeatedly force campaigns in specific union councils to be curtailed, postponed or cancelled outright. When that happens across consecutive rounds, a cohort of children accumulates who have missed not one opportunity but several. Poliovirus needs exactly that: a sufficient number of susceptible children in close enough contact to sustain a chain.

The history compounds it. The vaccination ban across North Waziristan from 2012 to 2014 left hundreds of thousands of children entirely unprotected and produced the 306-case national outbreak of 2014. The corridor's routine immunisation coverage has never fully recovered. See polio cases in 2014.

What the programme does where campaigns cannot run

• Vaccination at permanent transit points, reaching children as families travel rather than at home.
• Rapid deployment into any negotiated access window, however short.
• Vaccination in camps and host communities whenever displacement occurs.
• Community-based vaccinators recruited from within the area, who can work where outside teams cannot.
• Intensified environmental surveillance, so circulation is monitored even where households cannot be reached.

Cross-border dimension

The corridor borders Afghanistan, and the two countries are treated as a single epidemiological block. Campaign timing is synchronised and sequencing data is shared, because a strategy that stops at the border simply waits for reinfection. See joint Pak-Afghan work.

For families in the region

Take every round that reaches you. Two drops for every child under five, every time, without exception. If your family is travelling, let children be vaccinated at the transit point. Call 1166 if a team does not arrive.

Related: North Waziristan case record · eradication strategy