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'Just so hard to understand': Mystery illness causing unexplained paralysis in kids

Dr. Natalie Azar joins TODAY to talk about a mystery illness causing paralysis in children, now the subject of a nationwide search for the cause of the condition. The latest cases started during last fall’s enterovirus outbreak.

Dr. Natalie Azar joins TODAY to talk about a mystery illness causing paralysis in children, now the subject of a nationwide search for the cause of the condition. The latest cases started during last fall’s enterovirus outbreak.