Multiple sclerosis and poliomyelitis.
D000328:Adult; D000375:Aging; D005260:Female; D005843:Geography; D006801:Humans; D008297:Male; D009103:Multiple Sclerosis / Q000453:epidemiology* / Q000235:genetics*; D011051:Poliomyelitis / Q000453:epidemiology*; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious; D012621:Seasons; D012723:Sex; D012924:Social Conditions