Influenza, HumanInfluenza B virusInfluenza A virusInfluenza A Virus, H1N1 SubtypeInfluenza VaccinesInfluenza A Virus, H3N2 SubtypeAntiviral AgentsInfluenza in BirdsSeasonsInfluenza A Virus, H5N1 SubtypeInterferonsPopulation SurveillanceOrthomyxoviridaeHemagglutinin Glycoproteins, Influenza VirusPandemicsDisease OutbreaksOrthomyxoviridae InfectionsOutpatientsDrug Resistance, ViralInterferon Type IVirus ReplicationSentinel SurveillanceUnited StatesWorld HealthInfluenza A Virus, H9N2 SubtypeOseltamivirNeuraminidaseHospitalizationInfluenza A Virus, H3N8 SubtypeVaccinationPneumoniaInfluenza A Virus, H7N7 SubtypeHemagglutination Inhibition TestsAntigens, ViralInfluenza A Virus, H2N2 SubtypeAmantadineCell LineHemagglutinins, ViralVirus DiseasesRimantadineInfluenza A Virus, H5N2 SubtypeRNA, ViralInfluenza A Virus, H7N9 SubtypeAntibodies, ViralZanamivirViral ProteinsVaccinia virusRNA VirusesInterferon-alphaVirus SheddingBirdsViral Plaque AssayVirus CultivationInfluenza A Virus, H1N2 SubtypeReassortant VirusesReceptors, VirusMolecular Sequence DataInterferon InducersTime FactorsInterferon-betaVero CellsDisease NotificationAcyclovirVaccines, InactivatedReceptors, InterferonInfant, NewbornRibavirinDucksCercopithecus aethiopsOrganophosphonatesDogsInterferon-gammaMadin Darby Canine Kidney CellsVesicular stomatitis Indiana virusVirus AssemblyIncidenceHepacivirusPoultryHepatitis B virusEuropeInterferon Regulatory Factor-3Cells, CulturedPyransAmino Acid SequenceViral Nonstructural ProteinsMice, Inbred BALB CPhylogenyRNA ReplicaseRecombinant ProteinsDefective VirusesInfluenzavirus CGenes, ViralPneumonia, ViralVaccines, AttenuatedCytopathogenic Effect, ViralSindbis VirusDNA VirusesViral LoadSimian virus 40Viral Matrix Proteins