Pakistan, May 30 -- Pakistan has vaccinated approximately 36.4 million children as the third nationwide polio vaccination campaign of the year entered its fourth day today, Thursday, the country's polio program said.

Around 400,000 frontline workers, including 225,000 women vaccinators, are driving the campaign launched on Monday to vaccinate 45 million children under the age of five. The drive will conclude on June 1.

Polio is a paralyzing disease with no cure. Multiple doses of the oral polio vaccine, along with the completion of the routine immunization schedule for all children, are essential to ensure strong immunity against the disease.

Pakistan and Afghanistan are the last two countries in the world where polio remains endemic. ...