title: Immunization from a photographic perspective: the 1961 polio trial in Nova Scotia.
authors.affiliation: Medical School, Dalhousie University, Halifax, NS.
authors.forename: Rosalind
authors.initials: R
authors.lastname: Ashton
authors.forename: Susan H
authors.initials: SH
authors.lastname: Young
mesh_terms: D049673:History, 20th Century; D006801:Humans; D032541:Mass Vaccination / Q000266:history; D009674:Nova Scotia; D010781:Photography / Q000266:history; D011051:Poliomyelitis / Q000266:history* / Q000517:prevention & control; D011055:Poliovirus Vaccine, Oral / Q000266:history*
chemical_list: D011055:Poliovirus Vaccine, Oral