The document discusses the French integrated emergency medical system (IEMS) for public health civil defense. It describes the IEMS as having three sub-systems: 1) a pre-hospital emergency network, 2) a hospital emergency network, and 3) SAMU call centers for medical regulation and control. SAMU refers to the French emergency medical dispatch centers. The IEMS coordinates pre-hospital emergency responders like ambulances with hospital emergency departments and ICUs. It aims to improve both the quality and equity of emergency medical care through the national SAMU telemedicine network and civil defense policies. The SAMU network acts as the key component and "nervous system" of France's integrated emergency response system for daily