Pakistan, Oct. 26 -- On every street, snowy mountainside, remote desert and river crossing, Pakistan's polio frontline workers carry the promise of a healthier, polio-free future, protecting children with two drops of the life-saving vaccine at a time.

Braving harsh weather, rugged terrain, difficult journeys and resistance, more than 400,000 dedicated workers continue to visit households across the country to ensure that no child is left vulnerable to poliovirus, which can cause lifelong paralysis.

Over the past three decades, the tireless efforts of these workers, backed by the Government of Pakistan and its partners, have helped reduce polio cases by 99.8 per cent, from an estimated 20,000 annually in the early 1990s to 31 cases in 2...