Which code indicates a threat arising from biohazards, infectious agents, or other contamination?

• A. Red
• B. Green
• C. Amber
• D. Blue

Answer: (B)

Color-coded threat levels are designed so responders can instantly match a situation with the right containment actions. In this scheme, Green designates threats that come from biohazards, infectious agents, or contamination. That makes it the best fit for signaling the need for biosafety procedures—decontamination, proper PPE, restricted access, and containment measures.

Think of the other colors as signaling different kinds of hazards: Red often marks immediate, acute danger such as fire or explosive risk; Amber is a general caution or warning; Blue typically relates to medical emergencies or health-related incidents. Since the scenario specifically involves biohazards or contamination, Green is the color that aligns with that category.