Central Nervous System DiseasesCentral Nervous System Viral DiseasesMeningoencephalitisCentral Nervous System InfectionsNervous System DiseasesCentral Nervous SystemSubacute Sclerosing PanencephalitisBrainBrain DiseasesMaus Elberfeld virusMeningesCerebrospinal FluidAIDS Dementia ComplexDemyelinating DiseasesEnterovirus InfectionsAstrocytesImmune SystemDisease Models, AnimalMagnetic Resonance ImagingNeuronsCentral Nervous System NeoplasmsNervous SystemCells, CulturedImmune System DiseasesAutonomic Nervous System DiseasesLamin Type APeripheral Nervous SystemImmunity, InnateDigestive System DiseasesMice, Inbred C57BLPeripheral Nervous System DiseasesVasculitis, Central Nervous SystemImmunohistochemistryTime FactorsImmune ToleranceSpinal Cord