Influenza, HumanInfluenza A virusInfluenza in BirdsInfluenza A Virus, H5N1 SubtypeInfluenza A Virus, H1N1 SubtypeInfluenza VaccinesAvian ProteinsInfluenza A Virus, H3N2 SubtypeHemagglutinin Glycoproteins, Influenza VirusInfluenza B virusOrthomyxoviridae InfectionsInfluenza A Virus, H9N2 SubtypeBirdsPoultryOrthomyxoviridaeInfluenza A Virus, H7N7 SubtypeNeuraminidaseInfluenza A Virus, H5N2 SubtypeDucksReassortant VirusesInfluenza A Virus, H7N9 SubtypeHemagglutinins, ViralInfluenza A Virus, H3N8 SubtypeHemagglutination Inhibition TestsDisease OutbreaksInfluenza A Virus, H2N2 SubtypeAnseriformesPandemicsOseltamivirMutation, MissenseVirus SheddingVirus ReplicationChickensPoint MutationAntibodies, ViralAntiviral AgentsCloacaReceptors, VirusMolecular Sequence DataPoultry DiseasesPhylogenyMutationInfluenza A Virus, H7N3 SubtypeInfluenza A Virus, H7N1 SubtypeInfluenza A Virus, H1N2 SubtypeDogsMadin Darby Canine Kidney CellsViral ProteinsSeasonsVirus CultivationRNA, ViralAntigens, ViralCell LineAnimals, WildZanamivirFerretsZoonosesAmantadineGenes, ViralHemagglutininsVaccines, InactivatedVaccinationInfluenza A Virus, H7N2 SubtypeGeeseSequence Analysis, DNAAmino Acid SequenceAmino Acid SubstitutionVirulenceViral Matrix ProteinsRNA VirusesCross ProtectionNucleoproteinsChick EmbryoRNA ReplicaseVaccines, AttenuatedViral Plaque AssayVaccinia virusPneumonia, ViralBird DiseasesBase SequenceHemagglutination, ViralSwineEvolution, MolecularCharadriiformesVirus AttachmentAnimal MigrationCross ReactionsN-Acetylneuraminic AcidFrameshift MutationPyransRespiratory SystemViral Core ProteinsDrug Resistance, ViralLungNeutralization TestsReverse Transcriptase Polymerase Chain ReactionVirus DiseasesViral Nonstructural ProteinsAntigenic VariationSwine Diseases