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 SubtypeAnseriformesPandemicsOseltamivirVirus SheddingChickensVirus ReplicationAntibodies, ViralAntiviral AgentsCloacaReceptors, VirusPoultry DiseasesInfluenza A Virus, H7N3 SubtypePhylogenyInfluenza A Virus, H7N1 SubtypeInfluenza A Virus, H1N2 SubtypeMadin Darby Canine Kidney CellsSeasonsDogsVirus CultivationViral ProteinsAntigens, ViralAnimals, WildRNA, ViralMolecular Sequence DataZanamivirFerretsZoonosesAmantadineGenes, ViralVaccines, InactivatedVaccinationHemagglutininsCell LineInfluenza A Virus, H7N2 SubtypeGeeseViral Matrix ProteinsCross ProtectionRNA VirusesNucleoproteinsVirulenceChick EmbryoRNA ReplicaseVaccines, AttenuatedVaccinia virusPneumonia, ViralViral Plaque AssayBird DiseasesHemagglutination, ViralCharadriiformesSwineAnimal MigrationVirus AttachmentCross ReactionsSequence Analysis, DNAN-Acetylneuraminic AcidAmino Acid SequenceRespiratory SystemPyransVirus DiseasesViral Core ProteinsNeutralization TestsLungSwine DiseasesAntigenic VariationInfluenzavirus ASentinel SurveillanceEvolution, MolecularSialic AcidsViral Nonstructural ProteinsMice, Inbred BALB CAmino Acid SubstitutionChinaHost-Pathogen InteractionsSpecies Specificity