Influenza, HumanInfluenza B virusInfluenza A virusInfluenza A Virus, H1N1 SubtypeInfluenza VaccinesInfluenza A Virus, H3N2 SubtypeAntiviral AgentsInfluenza in BirdsSeasonsInfluenza A Virus, H5N1 SubtypePopulation SurveillanceOrthomyxoviridaeHemagglutinin Glycoproteins, Influenza VirusPandemicsDisease OutbreaksOrthomyxoviridae InfectionsOutpatientsDrug Resistance, ViralSentinel SurveillanceUnited StatesVirus ReplicationWorld HealthInfluenza A Virus, H9N2 SubtypeOseltamivirHospitalizationNeuraminidaseInfluenza A Virus, H3N8 SubtypeVaccinationPneumoniaInfluenza A Virus, H7N7 SubtypeHemagglutination Inhibition TestsInfluenza A Virus, H2N2 SubtypeAntigens, ViralAmantadineHemagglutinins, ViralRimantadineInfluenza A Virus, H5N2 SubtypeInfluenza A Virus, H7N9 SubtypeAntibodies, ViralZanamivirVirus DiseasesRNA, ViralRNA VirusesCell LineVaccinia virusVirus SheddingViral ProteinsBirdsViral Plaque AssayVirus CultivationReceptors, VirusInfluenza A Virus, H1N2 SubtypeReassortant VirusesDisease NotificationMolecular Sequence DataTime FactorsVaccines, InactivatedAcyclovirInfant, NewbornVero CellsDucksDogsOrganophosphonatesMadin Darby Canine Kidney CellsVirus AssemblyIncidenceCercopithecus aethiopsPoultryEuropeHepatitis B virusPyransPhylogenyRNA ReplicaseInfluenzavirus CDefective VirusesAmino Acid SequenceHepacivirusPneumonia, ViralGenes, ViralInterferonsVaccines, AttenuatedInfluenza A Virus, H7N3 SubtypeSimian virus 40DNA VirusesVesicular stomatitis Indiana virusViral Matrix ProteinsViral Nonstructural ProteinsRibavirinDNA, ViralPlant VirusesCross ProtectionSindbis VirusNeutralization TestsVirus ActivationNucleoproteinsRespiratory Syncytial VirusesSimplexvirusMice, Inbred BALB CMeasles virusTrifluridine