Polio is once again spreading in Pakistan, where officials say more than 1 million children missed their vaccination doses last month, underscoring the challenges they face in eradicating one of the world’s most intractable diseases.

According to World Health Organization Pakistan and Afghanistan remain the last two countries where polio is endemic

Polio cases are rising ahead of a new vaccination campaign in Pakistan, where violence targeting health workers and the police protecting them has hampered years of efforts toward making the country polio-free.

Cases of the polio virus – which causes paralysis or even death – have been rising across Pakistan – especially in southwestern Balochistan, southern Sindh, Khyber Pakhtunkhwa, and eastern Punjab provinces,

Pakistan and Afghanistan are the only countries where polio remains endemic, according to the World Health Organization (WHO): world news