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Reporter details rare disease that descended her into a month of madness

Susannah Cahalan was working as a journalist when she starting experiencing strange hallucinations and outbursts. After a turbulent medical journey, winding up catatonic in a hospital, her doctor found a clue that led to her diagnosis: anti-NMDA receptor encephalitis. Cahalan and her neurologist, Dr. Souhel Najjar, join Megyn Kelly TODAY to discuss her medical mystery — as retold in a Netflix film based on her book, “Brain on Fire,” — and how they solved it.

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