Defective VirusesChloramphenicol O-AcetyltransferaseInfluenza A virusChloramphenicolInfluenza, HumanMurine Acquired Immunodeficiency SyndromeInfluenza A Virus, H1N1 SubtypeAcetyltransferasesInfluenza VaccinesHemagglutinin Glycoproteins, Influenza VirusInfluenza A Virus, H3N2 SubtypeInfluenza A Virus, H5N1 SubtypeVirus ReplicationInfluenza in BirdsOrthomyxoviridaeGenes, ViralMolecular Sequence DataBase SequenceOrthomyxoviridae InfectionsInfluenza B virusCell LineChloramphenicol ResistancePromoter Regions, GeneticHelper VirusesViral ProteinsRNA, ViralTranscription, GeneticPlasmidsDNA, ViralGene Expression Regulation, ViralTransfectionViral InterferenceRNA VirusesNeuraminidaseVaccinia virusHemagglutinins, ViralVirus SheddingGene Expression RegulationLeukemia Virus, MurineReceptors, VirusVirus CultivationInfluenza A Virus, H9N2 SubtypeSimian virus 40Regulatory Sequences, Nucleic AcidGenome, ViralHemagglutination Inhibition TestsAmino Acid SequenceParticle SizeMutationRestriction MappingRNA, MessengerInfluenza A Virus, H3N8 SubtypeBirdsAntigens, ViralInfluenza A Virus, H7N7 SubtypeEnhancer Elements, GeneticAntibodies, ViralCloning, MolecularReassortant VirusesVirus AssemblyVirus DiseasesPandemicsGenetic VectorsHistone AcetyltransferasesAntiviral AgentsDucksCholine O-AcetyltransferaseHeLa CellsInfluenza A Virus, H5N2 SubtypeCells, CulturedGenetic Complementation TestGenesCercopithecus aethiopsOseltamivirGenes, RegulatorChickensDisease OutbreaksVirionDNA VirusesGenes, ReporterDogsPlant VirusesVero CellsBinding SitesInfluenza A Virus, H2N2 SubtypeEscherichia coliDNAInfluenza A Virus, H1N2 SubtypeDNA-Binding ProteinsRecombinant Fusion ProteinsMadin Darby Canine Kidney CellsTranscription FactorsPhylogenyInfluenza A Virus, H7N9 SubtypeMeasles virusSindbis VirusDNA PrimersChick EmbryoFerretsDNA, Recombinant