While you may not have been pleased about their arrival at the time, it turns out that if you had a baby brother or sister before you were 6 years old, your risk of developing multiple sclerosis may be greatly reduced. That’s what a new Australian study found when researchers compared people with multiple sclerosis (MS) to a control group of people who didn’t have the disease.People with more than five years of infant contact before they were 6 years old had almost a 90 percent reduced risk of MS, according to the study published in the Jan. 26 issue of the Journal of the American Medical Association.
