In the aviation industry, a "Code Blue" is a high-priority term used to signify a life-threatening medical emergency occurring on board an aircraft. When a member of the cabin crew or the flight deck announces a Code Blue, it indicates a time-sensitive health incident—such as cardiac arrest, a severe respiratory failure, an epileptic seizure, or even a childbirth—where every minute of delayed treatment significantly increases the risk of mortality. Upon the declaration of a Code Blue, the flight crew immediately follows an emergency protocol: they will typically call for any medical professionals among the passengers to assist, utilize the onboard Emergency Medical Kit (EMK) and Automated External Defibrillator (AED), and coordinate with ground-based medical advisory services. Simultaneously, the aircraft commander must decide whether to divert to the nearest suitable airport. Air traffic controllers will then clear the flight path to allow a direct, high-speed approach to the chosen airport and ensure that emergency medical services are ready to board the plane immediately upon landing to transport the patient to a hospital.