Early Signs of MS
2. Causes
Although the cause is unclear, some of the factors that have been implicated include genetic and molecular factors. Twin studies have found that genetic factors only have a modest effect in MS. However, the combination of predisposing genetics and environmental factors increases the likelihood of MS.
The risk of MS is 7 times higher compared to the general population if there is a first-degree family member who has MS. Viral infections have also been thought to contribute to the development of MS as the virus may activate parts of the immune system that would otherwise be dormant. Location is also an important factor as the incidence of the disease decreases in the equatorial regions compared to the northernmost and southernmost parts of the world. Another possible factor includes low levels of vitamin D.
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