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Your Family Tree

While the environment has an impact on MS risk, so too, does genetics. "If a mom has MS, her children have a 5% risk of having MS, and if a dad does, his daughters also have a 5% risk, but his sons have less of a risk,” says Dr. Rose.

It’s usually a combo of factors—genes and environmental triggers—that result in MS, even within families.

For example, the MS risk is 1 in 750 for most people, 1 in 40 for those with close family members with the disease, and 1 in 4 for those with an identical twin with it.

(Getty Images)

The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.

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