title: Afghanistan first in world to use new vaccine against polio. Critical step as global eradication effort faces entrenched challenges.
mesh_terms: D000346:Afghanistan / Q000453:epidemiology; D006801:Humans; D011051:Poliomyelitis / Q000517:prevention & control*; D011055:Poliovirus Vaccine, Oral / Q000627:therapeutic use*
chemical_list: D011055:Poliovirus Vaccine, Oral