title: The detection of chronic infection by viruses by immunofluorescent assay of specific IgM antibody.
mesh_terms: D002908:Chronic Disease; D005455:Fluorescent Antibody Technique; D006801:Humans; D007075:Immunoglobulin M / Q000032:analysis*; D009103:Multiple Sclerosis / Q000209:etiology / Q000276:immunology; D014777:Virus Diseases / Q000150:complications / Q000276:immunology*
chemical_list: D007075:Immunoglobulin M