Cytopathogenic Effect, ViralTrichomonasInfluenza A virusInfluenza, HumanInfluenza VaccinesInfluenza A Virus, H1N1 SubtypeDiarrhea Viruses, Bovine ViralInfluenza in BirdsInfluenza B virusInfluenza A Virus, H3N2 SubtypeTorovirus InfectionsInfluenza A Virus, H5N1 SubtypeBovine Virus Diarrhea-Mucosal DiseasePestivirusClassical swine fever virusHemagglutinin Glycoproteins, Influenza VirusOrthomyxoviridaeOrthomyxoviridae InfectionsRNA HelicasesTissue Culture TechniquesVirusesChicken anemia virusVirus CultivationInfluenza A Virus, H9N2 SubtypeViral Nonstructural ProteinsPandemicsGenome, ViralInfluenza A Virus, H3N8 SubtypeCell LineDefective VirusesRNA, ViralCattleVirus ReplicationPeptide HydrolasesInfluenza A Virus, H2N2 SubtypeNeuraminidaseInfluenza A Virus, H7N7 SubtypeHemagglutination Inhibition TestsMolecular Sequence DataResearchVirulenceDisease OutbreaksOseltamivirInfluenza A Virus, H5N2 SubtypeHemagglutinins, ViralInfluenza A Virus, H7N9 SubtypeCulture TechniquesSwineSeasonsReassortant Viruses