Which action helps prevent spread of contamination?

• A. Evacuate the area immediately
• B. Decontaminate victims before isolating the area
• C. Isolate the situation so that it does not spread to unaffected areas
• D. Notify all staff to remain in place

Answer: (C)

Preventing spread of contamination relies on containment. The most effective action is to isolate the situation—establish a clear boundary around the affected area, control access, and limit movement so clean areas aren’t exposed. This containment stops the contaminant from moving to people, spaces, or systems that aren’t affected yet, making subsequent decontamination and treatment safer and more manageable. Evacuating the area can unintentionally push contamination elsewhere if a proper containment boundary isn’t first in place. Decontaminating victims before isolating can spread contaminants through hallways and into unaffected zones, and simply telling staff to remain in place without establishing a controlled boundary risks exposure and further spread. So isolating the scene to prevent spread is the foundational, best approach.