Disaster Medicine: Large-scale application of emergency medical services in a community, following a natural or man-made catastrophe. The aim is to save lives and restore every survivor to maximum health as promptly as possible. Its success depends on prompt sorting of patients according to their immediate needs and prognosis. Disaster medicine specialists provide insight, guidance and expertise on the principles and practice of medicine both in the disaster impact area and healthcare evacuation receiving facilities to emergency management professionals, hospitals, healthcare facilities, communities and governments.