title: [When is multiple sclerosis acquired?].
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004641:Emigration and Immigration; D004777:Environment; D006801:Humans; D007223:Infant; D007557:Israel; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000209:etiology; D014171:Transients and Migrants