Defective VirusesInfluenza A virusInfluenza, HumanOrthomyxoviridaeInfluenza VaccinesAntigens, ViralMurine Acquired Immunodeficiency SyndromeInfluenza A Virus, H1N1 SubtypeHemagglutinin Glycoproteins, Influenza VirusInfluenza A Virus, H3N2 SubtypeInfluenza A Virus, H5N1 SubtypeInfluenza in BirdsAntibodies, ViralOrthomyxoviridae InfectionsVirus ReplicationInfluenza B virusHelper VirusesViral ProteinsRNA, ViralCell LineAntigensHemagglutinins, ViralRNA VirusesGenes, ViralNeuraminidaseViral InterferenceHemagglutination Inhibition TestsVaccinia virusVirus CultivationVirus SheddingLeukemia Virus, MurineDNA, ViralInfluenza A Virus, H9N2 SubtypeReceptors, VirusMolecular Sequence DataInfluenza A Virus, H3N8 SubtypeVirus DiseasesBirdsInfluenza A Virus, H7N7 SubtypePandemicsReassortant VirusesMeasles virusSimian virus 40Antiviral AgentsDucksInfluenza A Virus, H5N2 SubtypeGenome, ViralRespiratory Syncytial VirusesRabies virusDisease OutbreaksVirus AssemblyOseltamivirAntigens, BacterialInfluenza A Virus, H2N2 SubtypeInfluenza A Virus, H1N2 SubtypeDogsMadin Darby Canine Kidney CellsPlant VirusesAntigens, SurfaceDNA VirusesInfluenza A Virus, H7N9 SubtypeCross ReactionsNeutralization TestsAntigens, NeoplasmFerretsSindbis VirusPhylogenyGenetic Complementation TestBase SequenceVaccinationVaccines, InactivatedEnzyme-Linked Immunosorbent AssayPoultryViral Plaque AssayAmino Acid SequenceWest Nile virusChickensFluorescent Antibody TechniqueCercopithecus aethiopsViral Core ProteinsHepatitis B virusEpitopesVero CellsNucleoproteinsMice, Inbred BALB CVesicular stomatitis Indiana virusSeasonsAmantadineMutationCytopathogenic Effect, ViralVirionRNA ReplicaseAntibodies, MonoclonalVirulenceVirus ActivationVirus InactivationVaccines, AttenuatedZanamivirViruses, UnclassifiedSwine