Susannah Cahalan is an American author and journalist, best known for her memoir, 'Brain on Fire: My Month of Madness,' which chronicled her traumatic experience while undergoing treatment for a rare autoimmune disease. A 'Washington University' alumna, she currently works for the tabloid 'New York Post.' Cahalan was leading a normal life and was blessed with a flourishing career until she began displaying symptoms that appeared to be a psychological disorder. Unfortunately, she was misdiagnosed. Her condition remained a mystery until Dr. Souhel Najjar identified it as a neurological illness. Cahalan decided to write about her experience and thus released her award-winning bestseller, 'Brain on Fire,' which later got adapted into a 'Netflix' movie. She is now a prominent figure who promotes the treatment of rare diseases and mental illnesses in America.