Recently on Ellen, two women, Victoria Jackson and her daughter, Ali Guthy spoke about Neuromyelitis optica (NMO).
NMO is an autoimmune disease that attacks the optic nerve and the spinal chord.
After Ali was diagnosed in her young teens, she was given only 4 years to live.
Four years later, she's still going strong!
They've written a book called Saving Each Other and it's basically about how they're, for lack of better words, saving each other.
Check out the video (above) to learn a little more about their story and see how their relationship has saved both of their lives!
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