“Today the militant group continues to threaten to kill not only vaccinators but also parents who get their children immunized. That threat has had a chilling effect on anti-polio efforts nationwide. And it completely halted vaccination drives in some Taliban-controlled areas. It’s in these places that the crippling virus has come — and threatened to stymie global efforts to wipe out polio. The worldwide campaign to eradicate polio has been going on for more than two decades. It has more than $10 billion. Now the success of the campaign hinges on whether Pakistan can control the virus.”
Source: Taliban In Pakistan Derail World Polio Eradication : Goats and Soda : NPR