Encephalitis Treatment Market – Global Industry Size, Share, Trends, Opportunity, and Forecast, 2018-2028, Segmented By Type (Primary Encephalitis, Secondary Encephalitis), By Treatment (Antiviral Agents, Steroid Injection, Antibiotics, Immunoglobulin Therapy, Plasmapheresis, Others), By Symptoms (Fever, Drowsiness, Headaches, Personality Changes, Irritability, Confusion, Weakness, Seizures, Other