When was the polio vaccine first launched in Pakistan?
When was the polio vaccine first launched in Pakistan?
پاکستان میں پولیو ویکسین کا آغاز کب ہوا؟
Explanation
"Pakistan's polio immunization campaign began in 1974, but eradication efforts officially started in 1994.
The country had the most polio cases worldwide in 2014."