Respiratory Tract InfectionsTracheaVirus DiseasesLymphocytic choriomeningitis virusLymphocytic ChoriomeningitisArenaviridae InfectionsAcute DiseaseImmunologic MemoryCD8-Positive T-LymphocytesMice, Inbred C57BLRespiratory SystemSpleenMice, KnockoutCD4-Positive T-LymphocytesLymphocyte ActivationT-Lymphocyte SubsetsAntigens, ViralMice, Inbred BALB CAdoptive TransferMice, TransgenicFlow CytometryVirusesRespiratory Tract DiseasesParamyxoviridae InfectionsRespiratory Tract NeoplasmsRespiratory Syncytial Virus InfectionsVirus ReplicationRespiratory Syncytial VirusesLungOrthomyxoviridae InfectionsNasopharynxRhinovirusMetapneumovirusInfluenza A virusRespirovirus InfectionsPicornaviridae InfectionsUrinary Tract InfectionsRNA Virus Infections