VaccinationLeukemia Virus, MurineLeukemia Virus, FelineMoloney murine leukemia virusLeukemia Virus, BovineLeukemiaLeukemia, ExperimentalImmunodeficiency Virus, FelineFriend murine leukemia virusAKR murine leukemia virusCatsLeukemia, Myeloid, AcuteCat DiseasesFeline Acquired Immunodeficiency SyndromeHuman T-lymphotropic virus 1Mass VaccinationCalicivirus, FelineCoronavirus, FelineReceptors, VirusVirus ReplicationLeukemia Virus, Gibbon ApeAbelson murine leukemia virusCell LineLeukemia, Lymphocytic, Chronic, B-CellRetroviridae InfectionsRetroviridaeSarcoma Viruses, FelineLeukemia, FelineRNA VirusesRauscher VirusGene Products, taxMolecular Sequence DataLeukemia, LymphoidGenes, ViralDNA, ViralVaccinia virusInfluenza VaccinesFeline PanleukopeniaRNA, ViralVirus CultivationDefective VirusesViral ProteinsEnzootic Bovine LeukosisProvirusesTumor Virus InfectionsAntibodies, ViralFeline Infectious PeritonitisLeukemia, Myelogenous, Chronic, BCR-ABL PositiveFeline panleukopenia virusAntigens, ViralVirus AssemblyBase SequenceGene Products, gagInfluenza A Virus, H1N1 SubtypeLeukemia, T-CellRNA-Directed DNA PolymeraseVirus SheddingAmino Acid SequenceInfluenza, HumanCell Transformation, ViralOncogenic VirusesGammaretrovirusVirus DiseasesVirus IntegrationRetroviridae Proteins, OncogenicSimian virus 40Mice, Inbred AKRGenetic VectorsImmunization ProgramsVirionGene Products, envViral Envelope ProteinsLeukemia-Lymphoma, Adult T-CellMeasles virusHuman T-lymphotropic virus 2DeltaretrovirusPrecursor Cell Lymphoblastic Leukemia-LymphomaT-LymphocytesGene Expression Regulation, ViralRepetitive Sequences, Nucleic AcidNeutralization TestsRadiation Leukemia VirusHylobatesPlant VirusesRabies virusSindbis VirusDNA VirusesInfluenza A Virus, H5N1 SubtypeInfluenza A Virus, H3N2 SubtypePolymerase Chain ReactionGenes, envLentivirus InfectionsAvian leukosis virusViral VaccinesTerminal Repeat SequencesMinkHTLV-I InfectionsLymphomaHepatitis B VaccinesImmunization Schedule