Sibling infections protect against MS

Study Findings:

  • Exposure to a younger sibling’s infections during the first six years of life helps the elder child’s immune system develop and cut the risk of multiple sclerosis (MS) later on.
  • Those who as children had up to five years of contact with a younger sibling had an 88 per cent reduced risk of developing multiple sclerosis. Those with one to three years of exposure had a 43 per cent reduced risk. Longer exposure to a younger brother or sister also translated into a lower risk of developing mononucleosis and lessened the chances of an exaggerated immune response to the Epstein-Barr virus.

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