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A member asked:
Why does canada have the highest rates of multiple sclerosis in the world?
A doctor has provided 1 answer
Not fully clear: The incidence of Multiple Sclerosis increases as one lives further North of latitudes 39-42, and this may be related to sun exposure and secondary Vitamin D levels in the body, but other environmental factors including hereditary disease susceptibility and smoking do seem to be key.
Answered 10/21/2015
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