Health workers mark the finger of a child after administering polio vaccine drops during the polio campaign in Karachi yesterday. Pakistan is one of only two countries in the world where polio, a crippling childhood disease, remains endemic.
Health workers mark the finger of a child after administering polio vaccine drops during the polio campaign in Karachi yesterday. Pakistan is one of only two countries in the world where polio, a crippling childhood disease, remains endemic.