Twenty-seven young patients with multiple sclerosis (MS) were studied to determine if they had received prior measles vaccination. Fourteen patients whose immunization records were available had received measles vaccine in childhood. Eight other patients gave a history of receiving measles vaccine. These results suggest that infection by measles virus is probably not the sole cause of MS and that, unlike subacute sclerosing panencephalitis and postmeasles encephalitis, MS may not be preventable by measles vaccination given at an appropriate age.
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