Antibodies, Monoclonal/administration & dosage; Cell Migration Inhibition; Central Nervous System/pathology; Chemokine CCL5/immunology; Chemotaxis, Leukocyte/immunology; Coronavirus Infections/therapy; Encephalomyelitis/therapy; Multiple Sclerosis/immunology; Animals; Antibodies, Monoclonal/therapeutic use; Central Nervous System/immunology; Central Nervous System/virology; Chemokine CCL5/antagonists & inhibitors; Chemokine CCL5/biosynthesis; Chemokine CCL5/genetics; Chemokines, CC/immunology; Chemokines, CC/metabolism; Coronavirus Infections/immunology; Coronavirus Infections/pathology; Demyelinating Diseases/immunology; Demyelinating Diseases/pathology; Demyelinating Diseases/prevention & control; Disease Models, Animal; Encephalomyelitis/immunology; Encephalomyelitis/pathology; Injections, Intraperitoneal; Ligands; Macrophage Activation/immunology; Macrophages/immunology; Macrophages/pathology; Mice; Mice, Inbred C57BL; Multiple Sclerosis/pathology; Multiple Sclerosis/prevention & control; Murine hepatitis virus/immunology; RNA, Messenger/antagonists & inhibitors; RNA, Messenger/biosynthesis; Severity of Illness Index; T-Lymphocyte Subsets/immunology; T-Lymphocyte Subsets/pathology; T-Lymphocyte Subsets/virology