Viral LoadAntiviral AgentsRibavirinHepatitis C, ChronicInterferon-alphaHIV InfectionsHepacivirusHIV-1Hepatitis CRNA, ViralHepatitis B, ChronicVirus ReplicationPolyethylene GlycolsDrug Resistance, ViralAcyclovirAnti-HIV AgentsInterferonsViremiaDNA, ViralHepatitis B virusDrug Therapy, CombinationOrganophosphonatesCytomegalovirus InfectionsCD4 Lymphocyte Count2-AminopurineTreatment OutcomeCytomegalovirusLiver CirrhosisGanciclovirLamivudineAntiretroviral Therapy, Highly ActiveHepatitis BGenotypeHIVLiver TransplantationOseltamivirVirus DiseasesInfluenza, HumanRecombinant ProteinsAdeninePolymerase Chain ReactionRetinal Necrosis Syndrome, AcuteAmantadineVirus SheddingReverse Transcriptase InhibitorsHepatitis B e AntigensVirus ActivationFoscarnetHerpes ZosterTime FactorsDisease ProgressionCell LineVirusesInfluenza A Virus, H1N1 SubtypeCD4-Positive T-LymphocytesRecurrenceCD8-Positive T-LymphocytesInterferon Type IValineRomaniaAntibodies, ViralHerpes SimplexMolecular Sequence DataEye Infections, ViralRetrospective StudiesHost-Pathogen InteractionsViral Nonstructural ProteinsAnti-Retroviral AgentsAcquired Immunodeficiency SyndromeHerpesvirus 2, HumanNucleosidesHerpes GenitalisViral ProteinsVero CellsMutationPneumonia, ViralZidovudineHepatitis B Surface AntigensImmunocompromised HostEncephalitis, Herpes SimplexSimian immunodeficiency virusSimian Acquired Immunodeficiency SyndromeVirus InternalizationAlanine TransaminaseCoinfectionReagent Kits, DiagnosticDrug MonitoringCryoglobulinemiaHIV Protease InhibitorsCohort StudiesHerpes LabialisVirologyHerpes Zoster OphthalmicusCercopithecus aethiopsPregnancy Complications, InfectiousProspective StudiesInterferon-betaMacaca mulattaHerpesvirus 3, HumanInfluenza A virus