Acquired Immunodeficiency SyndromeMurine Acquired Immunodeficiency SyndromeSyndromeHIV-1HIV InfectionsSimian immunodeficiency virusHIVAIDS-Related Opportunistic InfectionsSimian Acquired Immunodeficiency SyndromeAIDS-Related ComplexImmunologic Deficiency SyndromesFeline Acquired Immunodeficiency SyndromeImmunodeficiency Virus, FelineHomosexualitySevere Combined ImmunodeficiencyMolecular Sequence DataHIV SeropositivityVirus ReplicationAnti-HIV AgentsZidovudineCD4 Lymphocyte CountCommon Variable ImmunodeficiencyPneumonia, PneumocystisHIV AntibodiesLymphoma, AIDS-RelatedCell Linetat Gene Products, Human Immunodeficiency VirusBase SequenceHIV AntigensHIV-2Antiretroviral Therapy, Highly ActiveAmino Acid SequenceMacaca mulattaRNA, ViralDeltaretrovirusCD4-Positive T-LymphocytesHIV Envelope Protein gp120Sarcoma, KaposiT-LymphocytesGene Products, gagMutationViral LoadDNA, ViralLeukemia Virus, MurineHIV Core Protein p24Antigens, CD4Disease Models, AnimalOpportunistic InfectionsCytomegalovirus RetinitisDown SyndromeRetroviridae InfectionsCells, CulturedMetabolic Syndrome XPolymerase Chain ReactionReverse Transcriptase InhibitorsTime FactorsMice, Inbred C57BLToxoplasmosis, CerebralHIV Reverse TranscriptaseGene Products, envAntibodies, Viralnef Gene Products, Human Immunodeficiency VirusRetroviridae ProteinsAntiviral AgentsLymphatic DiseasesHIV SeronegativityAIDS SerodiagnosisRNA-Directed DNA PolymeraseDidanosineAIDS Dementia ComplexReceptors, CCR5gag Gene Products, Human Immunodeficiency VirusRisk FactorsFatal OutcomePhenotypeSubstance Abuse, IntravenousAIDS VaccinesHIV SeroprevalenceHIV Protease InhibitorsProvirusesHIV Long Terminal RepeatLymphocyte ActivationUnited StatesLeukocytes, MononuclearImmunocompromised HostGene Products, tatDisease ProgressionPentamidinerev Gene Products, Human Immunodeficiency VirusLeukocyte CountMice, Inbred BALB CNephrotic SyndromeHemophilia AAntibodies, MonoclonalLymphocytesNeutralization TestsZalcitabineSjogren's SyndromeGenes, envMycobacterium avium-intracellulare Infection