Influenza, HumanInfluenza A virusInfluenza A Virus, H1N1 SubtypeInfluenza VaccinesInfluenza A Virus, H5N1 SubtypeInfluenza in BirdsInfluenza A Virus, H3N2 SubtypeHemagglutinin Glycoproteins, Influenza VirusInfluenza B virusPopulation SurveillanceOrthomyxoviridae InfectionsInfluenza A Virus, H9N2 SubtypeOrthomyxoviridaeInfluenza A Virus, H7N9 SubtypeSentinel SurveillanceHemagglutinins, ViralBirdsDisease OutbreaksVaccinia virusHemagglutination Inhibition TestsNeuraminidaseVirus ReplicationReceptors, VirusAntibodies, ViralRNA VirusesPandemicsInfluenza A Virus, H3N8 SubtypeInfluenza A Virus, H7N7 SubtypeVirus SheddingVirus CultivationAntigens, ViralInfluenza A Virus, H7N1 SubtypePhylogenyViral ProteinsInfluenza A Virus, H5N2 SubtypeMolecular Sequence DataInfluenza A Virus, H2N2 SubtypeVirus DiseasesSeasonsAntiviral AgentsCell LinePublic Health SurveillanceOseltamivirRNA, ViralChickensGenes, ViralVaccinationInfluenza A Virus, H1N2 SubtypeVirus AssemblyDogsSimian virus 40Defective VirusesPlant VirusesDNA VirusesAmino Acid SequenceDucksMeasles virusReassortant VirusesSindbis VirusRabies virusVaccines, InactivatedRespiratory Syncytial VirusesPoultryUnited StatesWest Nile virusMadin Darby Canine Kidney CellsFerretsChick EmbryoAmantadineNeutralization TestsHepatitis B virusTime FactorsProduct Surveillance, PostmarketingSequence Analysis, DNADisease NotificationVesicular stomatitis Indiana virusCercopithecus aethiopsVirus ActivationIncidenceVero CellsVaccines, AttenuatedVirionViral Plaque AssayZanamivirMice, Inbred BALB CInfluenza A Virus, H7N3 SubtypeCommunicable Diseases, EmergingVirologyImmunologic SurveillanceVirus LatencyInfluenzavirus CPolymerase Chain ReactionVirus AttachmentPneumonia, ViralHIV InfectionsCross ReactionsDrug Resistance, ViralDNA, ViralReverse Transcriptase Polymerase Chain ReactionParainfluenza Virus 1, Human