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Tue, Jan 06

Genetic clue solves toddler’s debilitating illness

Two year-old Cara Greene was a healthy toddler until last November, when her parents, Kristen and Clayton, noticed something wasn’t right.

“Her eye movements were just completely erratic and that was really scary,” Kristen said. “You would look at her and her eyes would just move all over.”

Within weeks, Cara lost muscle control and became unsteady on her feet. Her arms grew limp and even keeping her head up was a struggle.

Read more and watch the story from CBS News.