Pakistanis travelling to India will require mandatory polio vaccination, the Indian embassy said, tightening cross-border travel rules with a new policy which also affects other nations impacted by the crippling disease.

Pakistan, one of only three countries where polio remains endemic, has struggled to combat the disease after the Pakistani Taliban banned polio immunisation following a fake CIA vaccination programme meant to help track Al Qaeda chief Osama Bin Laden.

The ban last year has led to a surge in polio cases in Pakistan that threatens worldwide efforts to eradicate the infectious disease, which is also endemic in Nigeria and Afghanistan. "All persons - adults and children - traveling to India from Pakistan after January 30, 2014 are required to obtain Oral Polio Vaccination (OPV) at least six week prior to their departure to India," the Indian high commission (embassy) in Islamabad said in a statement on Wednesday. "The step is being taken to safeguard India's polio-free status attained after sustained efforts and investment," it said, adding that "evidence of polio vaccination will be requested for entry into India".The statement said the new policy is applicable to travelers not just from Pakistan but all countries where polio is endemic or where cases of the disease are reported.

The new measure will potentially make cross-border travel harder for Pakistanis - hundreds of thousands of whom have families in India separated in the 1947 partition.

Nuclear-armed rivals India and Pakistan agreed last year to ease visa restrictions, reflecting demands in both nations for closer people-to-people ties. "The new requirement by India will certainly add to hassles as all those travelling to India will now have to obtain and append OPV records with their visa applications," said Islamabad-based travel agent Hassan Rizvi.AFP