An immunisation program saw Polio retreat from the developed world - then a concerted campaign in the '80's all but wiped it out in the developing world. So why has Pakistan become a polio hotspot with cases on the rise?
An immunisation program saw Polio retreat from the developed world - then a concerted campaign in the '80's all but wiped it out in the developing world. So why has Pakistan become a polio hotspot with cases on the rise?