title: Calls for vaccine challenge studies.
authors.forename: Gary D
authors.initials: GD
authors.lastname: Norsworthy
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000097:blood*; D004283:Dog Diseases / Q000276:immunology / Q000517:prevention & control*; D004285:Dogs; D012107:Research Design; D016036:Seroepidemiologic Studies; D013997:Time Factors; D014611:Vaccination / Q000592:standards / Q000662:veterinary*; D014765:Viral Vaccines / Q000276:immunology / Q000592:standards*; D014777:Virus Diseases / Q000276:immunology / Q000517:prevention & control / Q000662:veterinary*
chemical_list: D000914:Antibodies, Viral; D014765:Viral Vaccines