In the thick of rising polio cases and relentless vaccination campaigns, the abduction of three senior WHO officials monitoring one such campaign marks a sombre day in the journey against this fatal disease. The three officials were abducted in the Tank district of Khyber-Pakhtunkhwa, the most recent province to report two more confirmed polio cases. While the crime has not been officially claimed by any group, the Tank district harbours a violent history of abductions and attacks by militant........

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