Which term describes an incident requiring a coordinated medical response for multiple casualties?

• A. Mass Casualty
• B. Medical Drift
• C. Medical Surge
• D. Public Health Event

Answer: (A)

Mass casualty describes an incident that creates more patients than the local medical system can handle with its usual resources, triggering a coordinated medical response, rapid triage, and the mobilization of additional help to allocate limited resources effectively. The key idea is the surge of casualties from a single event and the need for organized, multi-agency action to save as many lives as possible.

Medical surge deals with a broader situation—how a health care system expands capacity over hours to days to treat increased patient volume, such as during epidemics or large events—rather than the immediate, incident-driven demand of a single disaster. Medical drift refers to clinicians gradually deviating from established protocols, not to incident scale or response needs. A public health event is a population-level health concern, which can be large in scope but isn’t defined by the urgent, multi-casualty response dynamic of an incident.