I find many reporters get many facts WRONG, and frequently give half truths.

She may have died from other things like a pnuemonia, or cancer, or hit by a bus. Its RARE to die from MS solely but the complications like "the ms hug" not allowing your diaphram to expand can set up a pnuemonia. If you have lesions in your brain stem, it can affect your heart/lungs/nervous system.

you can google the woman name and see if you can get more info.