NIGERIA- Ahmadu Kanduwa’s home is just two kilometers away from the local clinic in Nigeria’s northern Sumaila district -two kilometers from the vaccine that could have prevented his son, Isa, from contradicting polio more than a year ago. It’s something Kanduwa thinks about often. “I have this thought, if he had received say five or six doses, he would have been immune from this ailment,” Kanduwa said. He says Isa received two of the oral polio vaccinations. Painfully close to the four doses recommended for complete immunity. In a district that now has an immunization rate of around 85%, officials hope Isa’s will be Nigeria’s last new case of polio.(CNN NEWS/ www.cnn.com)…[+]