title: A better system for polio vaccination in developing countries.
mesh_terms: D002648:Child; D003906:Developing Countries; D006801:Humans; D007115:Immunization Schedule; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage*; D014611:Vaccination / Q000379:methods*
chemical_list: D011054:Poliovirus Vaccine, Inactivated