title: One more step.
authors: C G
authors: CG
authors: de Macedo
mesh_terms: D000569:Americas; D006801:Humans; D010175:Pan American Health Organization; D010686:Philosophy, Medical; D011051:Poliomyelitis / Q000453:epidemiology / Q000517:prevention & control*; D017955:Poliovirus / Q000276:immunology; D011054:Poliovirus Vaccine, Inactivated / Q000627:therapeutic use*
chemical_list: D011054:Poliovirus Vaccine, Inactivated