title: The persistence of polio.
mesh_terms: D019353:Endemic Diseases / Q000191:economics / Q000517:prevention & control*; D006293:Health Promotion / Q000191:economics; D006801:Humans; D011051:Poliomyelitis / Q000191:economics / Q000517:prevention & control*; D017955:Poliovirus / Q000472:pathogenicity*; D015164:Vaccines, Inactivated / Q000627:therapeutic use*; D014944:World Health Organization
chemical_list: D015164:Vaccines, Inactivated