Influenza A virusInfluenza, HumanInfluenza A Virus, H1N1 SubtypeOrthomyxoviridae InfectionsInfluenza A Virus, H1N2 SubtypeInfluenza A Virus, H3N2 SubtypeSwine DiseasesSwineHemagglutinin Glycoproteins, Influenza VirusReassortant VirusesInfluenza VaccinesInfluenza in BirdsInfluenza A Virus, H5N1 SubtypeOrthomyxoviridaeInfluenza B virusHemagglutination Inhibition TestsHemagglutinins, ViralNeuraminidaseBirdsPandemicsInfluenza A Virus, H9N2 SubtypeAntibodies, ViralPhylogenyVirus SheddingPneumonia, ViralZoonosesVirus ReplicationDisease OutbreaksReceptors, VirusMolecular Sequence DataAntigens, ViralInfluenza A Virus, H3N8 SubtypeInfluenza A Virus, H2N2 SubtypeInfluenza A Virus, H7N9 SubtypeViral ProteinsRNA, ViralInfluenza A Virus, H7N7 SubtypeVaccinia virusRNA VirusesGenes, ViralAntifoaming AgentsInfluenza A Virus, H5N2 SubtypeVirus CultivationCell LineAntigenic VariationCross ReactionsAntiviral AgentsOseltamivirSequence Analysis, DNALungFerretsDogsDucksChick EmbryoPorcine respiratory and reproductive syndrome virusVirus DiseasesVirulenceSeasonsMadin Darby Canine Kidney CellsVaccinationAmino Acid SequenceChinaChickensPoultryN-Acetylneuraminic AcidInfluenza A Virus, H7N1 SubtypeHemagglutininsVirus AssemblyDefective VirusesVaccines, InactivatedSimian virus 40Viral Matrix ProteinsAmantadineVirologyZanamivirGenome, ViralDNA VirusesPlant VirusesNucleoproteinsAntibodies, NeutralizingCross ProtectionNeutralization TestsSindbis VirusQuebecMeasles virusCircovirusEnzyme-Linked Immunosorbent AssayRespiratory Syncytial VirusesVaccines, AttenuatedRNA ReplicaseViral Core ProteinsAnseriformesRabies virusViral Plaque AssayInfluenzavirus AMice, Inbred BALB CReverse Transcriptase Polymerase Chain ReactionEvolution, MolecularCercopithecus aethiopsVirus Inactivation