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Majority of Children Vaccinated Against Hepatitis B Not at Increased Risk of MS ST. PAUL, Minn -- September 25, 2008 -- The majority of children vaccinated against hepatitis B are not at an increased risk of developing multiple sclerosis (MS), according to a study to be published in the October 8 online issue of Neurology. The study involved 349 children with MS and 2,941 children without the disease. The children were all aged younger than 16 years. A total of 24.4% of the children with MS were vaccinated for hepatitis B in the 3 years before the study, compared to 27.3% of the children without MS. Although the study found that hepatitis B vaccination does not generally increase the risk of multiple sclerosis, the children with MS were 1.74 times more likely to have received a certain type of hepatitis B vaccine (Engerix-B). Those children with MS developed symptoms 3 or more years after the vaccine. The risk was only found for this specific type of hepatitis B vaccine and not found for all vaccines against hepatitis B. This association cannot be taken as confirmation that the vaccine caused MS. Further studies are needed to determine whether this is a causal relationship. SOURCE: The American Academy of Neurology E-mail this page to a friend or colleague! To print, use this version