title: Epidemiology of multiple sclerosis and a possible virus aetiology.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D044466:Asian People; D044383:Black People; D002555:Cerebrospinal Fluid / Q000276:immunology; D002648:Child; D002980:Climate; D004641:Emigration and Immigration; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics / Q000276:immunology; D012424:Rural Population; D012621:Seasons; D012737:Sex Factors; D012959:Socioeconomic Factors; D013997:Time Factors; D014505:Urban Population; D014777:Virus Diseases; D044465:White People