title: Why changes in administration of polio vaccine?
authors.affiliation: Department of Pediatrics, University of Texas Health Science Center, San Antonio, USA.
authors.forename: D A
authors.initials: DA
authors.lastname: Conrad
mesh_terms: D006801:Humans; D011055:Poliovirus Vaccine, Oral / Q000008:administration & dosage*
chemical_list: D011055:Poliovirus Vaccine, Oral