The strange pains would attack without warning, almost as if they were changing with the weather.

And every time they hit Katy Mena — young twentysomething, seemingly in her prime — it was something different. An unshakable cold in her legs. Double vision. Tingling pain in her limbs. A tight, squeezing sensation around her torso, like an unwelcome hug.

Sometimes a leg would go limp, or she suddenly couldn't use her arm. Some days she would feel electric shocks all over her body.

For nearly a decade, Mena, now 32, battled the progression of multiple sclerosis with treatments that couldn't seem to do much to keep its devastating effects at bay.

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