title: Canada not immune to spread of polio.
authors.affiliation: Ottawa, Ont.
authors.forename: Carolyn
authors.initials: C
authors.lastname: Brown
mesh_terms: D002170:Canada; D004196:Disease Outbreaks / Q000517:prevention & control / Q000706:statistics & numerical data*; D006801:Humans; D011051:Poliomyelitis / Q000453:epidemiology* / Q000517:prevention & control; D017955:Poliovirus / Q000276:immunology*; D011054:Poliovirus Vaccine, Inactivated / Q000008:administration & dosage*; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage*; D014611:Vaccination / Q000706:statistics & numerical data*
chemical_list: D011054:Poliovirus Vaccine, Inactivated; D011055:Poliovirus Vaccine, Oral