Immune SystemImmunity, InnateImmune ToleranceImmune System DiseasesT-LymphocytesImmunityCytokinesMice, Inbred C57BLAdaptive ImmunityImmunity, CellularDisabled PersonsLymphocyte ActivationMice, Inbred BALB CImmune EvasionDendritic CellsSpleenAntibody FormationModels, ImmunologicalImmunoglobulin GCD4-Positive T-LymphocytesInterferon-gammaB-LymphocytesAntigen-Antibody ComplexImmune SeraHIV InfectionsInflammationMacrophagesToll-Like ReceptorsLymphocytesSignal TransductionCells, CulturedMice, KnockoutImmune System ProcessesTime FactorsFlow CytometryRisk FactorsKiller Cells, NaturalImmunity, MucosalAdjuvants, ImmunologicEnzyme-Linked Immunosorbent AssayImmunity, HumoralMolecular Sequence DataDisease Models, AnimalImmune Complex DiseasesAgingImmunotherapyUnited StatesHost-Pathogen InteractionsAutoimmune DiseasesImmunizationVaccinationAntibodies, ViralAutoimmunityT-Lymphocytes, RegulatoryImmunoglobulinsQuestionnairesAntigensLipopolysaccharidesNeoplasmsReceptors, Pattern RecognitionT-Lymphocyte SubsetsPrevalenceImmunoglobulin AImmunologic FactorsHomeless PersonsTh1 CellsGene Expression RegulationCross-Sectional StudiesImmunoglobulin MLeukocytes, MononuclearImmunomodulationAntigens, CDCell LineThymus GlandTh2 CellsImmunologic SurveillanceChronic DiseaseInfectionAmino Acid SequenceNeuroimmunomodulationVaccinesInterleukin-10Mice, TransgenicLymph NodesLymphocyte SubsetsTumor Necrosis Factor-alphaImmunologic MemoryMembrane GlycoproteinsLymphoid TissueMonocytesAntibodies, BacterialAcquired Immunodeficiency SyndromeLymphocyte CountSex FactorsToll-Like Receptor 4Cohort StudiesT-Lymphocytes, CytotoxicLeukocytesIncidenceAntigen Presentation