Nigeria’s fight to wipe out polio | CNN

Nigeria has been polio-free for a year thanks to a huge immunization campaign. But the fight against polio isn’t over.分類：health and medical, viruses, polio, public health, communicable disease control, vaccination and immunization, business figures, bill gates, africa, western africa, nigeria, world health organization, health care, health care professionals, physicians and surgeons, diseases and disorders, infectious diseases, life forms, microscopic life, society...