title: Absence of herpes simplex virus antigen in brain in encephalitis lethargica.
mesh_terms: D000293:Adolescent; D000956:Antigens, Viral / Q000032:analysis*; D004671:Encephalitis, Arbovirus / Q000276:immunology*; D006561:Herpes Simplex / Q000276:immunology*; D006801:Humans; D008297:Male; D018139:Simplexvirus / Q000276:immunology
chemical_list: D000956:Antigens, Viral