title: Polio rare in United States but experts counsel caution.
mesh_terms: D002675:Child, Preschool; D004196:Disease Outbreaks / Q000453:epidemiology; D006801:Humans; D007223:Infant; D011051:Poliomyelitis / Q000453:epidemiology*; D011054:Poliovirus Vaccine, Inactivated / Q000009:adverse effects; D014481:United States; D014611:Vaccination
chemical_list: D011054:Poliovirus Vaccine, Inactivated