KHAIRPUR: Two polio vaccinators were wounded in Shah Latif town in Sindh's Khairpur district on Friday, DawnNews reported.

Unknown attackers beat up the members of the polio vaccination team with sticks.

A case was registered against unknown persons at the Shah Latif Police station.

Pakistan is one of three countries where the polio virus still exists.

The World Health Organisation had declared Pakistan's northwestern city of Peshawar as the world's “largest reservoir” of the polio virus.

Polio teams come under frequent attack from militant groups who see vaccination campaigns as a cover for espionage, and there are also long running rumours about polio drops causing infertility.

According to the World Health Organisation, Pakistan recorded 91 cases of polio last year compared with 58 in 2012.