Influenza, HumanInfluenza A virusVaccinationInfluenza A Virus, H1N1 SubtypeInfluenza VaccinesOrthomyxoviridae InfectionsInfluenza A Virus, H3N2 SubtypeInfluenza B virusInfluenza in BirdsInfluenza A Virus, H5N1 SubtypeOrthomyxoviridaePandemicsHemagglutinin Glycoproteins, Influenza VirusMass VaccinationOseltamivirAntibodies, ViralHemagglutination Inhibition TestsInfluenza A Virus, H2N2 SubtypeDisease OutbreaksNeuraminidasePneumonia, ViralVaccines, InactivatedSeasonsLungAntiviral AgentsInfluenza A Virus, H9N2 SubtypeInfluenza A Virus, H5N2 SubtypeInfluenza A Virus, H3N8 SubtypeHemagglutinins, ViralZanamivirImmunization ProgramsMice, Inbred BALB CInfluenzavirus ABirdsMice, Inbred C57BLMadin Darby Canine Kidney CellsInfluenza A Virus, H7N7 SubtypeAmantadineDucksCross ProtectionVaccines, AttenuatedPoultryCD8-Positive T-LymphocytesImmunization, SecondaryVirus SheddingAdministration, IntranasalImmunization ScheduleFerretsInfluenza A Virus, H7N9 SubtypeDogsAntigens, ViralReassortant VirusesImmunity, HumoralPopulation SurveillanceHepatitis B VaccinesCross ReactionsVaccinesTime FactorsPapillomavirus VaccinesImmunizationViral VaccinesInfluenza A Virus, H1N2 SubtypeRespiratory Tract InfectionsDisease Models, AnimalSmallpoxPneumonia, PneumococcalAntibodies, NeutralizingUnited StatesEpidemicsPyransPneumococcal VaccinesVirus ReplicationImmunity, CellularVaccines, DNASmallpox VaccineCytokinesPneumoniaCancer VaccinesHealth PersonnelImmunologic MemoryCell LineCD4-Positive T-LymphocytesMeasles VaccineReye SyndromeImmunity, InnateIntegrin alpha1beta1HospitalizationVaccines, SyntheticLyciumInfant, NewbornViral LoadChickensAdjuvants, ImmunologicNasopharynxBCG VaccineImmunoglobulin GPregnancy Complications, InfectiousBacterial VaccinesRNA, ViralVaccines, Subunit