Exclusive: Former OpenAI exec Fidji Simo discusses her battle with POTS and her startup’s plans to cure it with AI and 3,500 vials of blood (so far) | Fortune0

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• August 3, 2026

When Fidji Simo announced she was leavin g her role as one of the most senior members of OpenAI’s leadership team after a seven year battle with her chronic illness, Postural Orthostatic Tachycardia Syndrome, or POTS, the news felt unexpectedly personal. My little cousin has POTS, and it’s been devastating to witness. Simo’s post said