If you find someone with similar or even the same symptoms, that doesn't mean the same treatment will work for both of you. Now, we may know why that is true.
Researchers at the University of Michigan tell us that even people with the very same symptoms may have different forms of the disease. In an article published in the latest Journal of Experimental Medicine they tell us they injected mice with different forms of the disease, but they developed the same symptoms.
So far it's just mice, but this research thread may lead to customized treatments in the future based on your particular MS subtype.