Fidji Simo, the head of applications at OpenAI, has announced her resignation from her full-time position due to a chronic illness that requires long-term recovery. Simo, who has been dealing with the illness for seven years, shared on the X platform that she will transition to a part-time advisory role to focus on her health. Despite stepping down, Simo remains committed to OpenAI's mission and plans to continue advancing AI applications in healthcare. She emphasized the importance of AI in addressing real-world challenges, particularly in disease treatment and medical innovation, and will also engage in biotech projects to further these goals.