Which statements about biological hazards are true?

Which statements about biological hazards are true?

• A. I, II and III
• B. I, II and IV
• C. II and III
• D. III and IV

Answer: (B)

Biological hazards revolve around how exposure to biological agents can occur and how risk is best controlled. To judge statements, you want to confirm that each point reflects how pathogens (bacteria, viruses, fungi, parasites, and their toxins) are transmitted, how infectious dose and host factors influence risk, and how the risk is reduced using the hierarchy of controls (elimination, engineering controls, administrative controls, and PPE). A true statement will accurately describe one of these aspects—such as the importance of exposure routes (inhalation, ingestion, skin/mucous membrane contact), the role of dose and host susceptibility, or the need for layered controls rather than relying solely on PPE. The best choice is the one that groups only true statements together, giving a coherent picture of how biological hazards behave and how to mitigate them. Statements that claim universal immunity, a single transmission route for all hazards, or that controls are unnecessary would be false.

Biological hazards revolve around how exposure to biological agents can occur and how risk is best controlled. To judge statements, you want to confirm that each point reflects how pathogens (bacteria, viruses, fungi, parasites, and their toxins) are transmitted, how infectious dose and host factors influence risk, and how the risk is reduced using the hierarchy of controls (elimination, engineering controls, administrative controls, and PPE). A true statement will accurately describe one of these aspects—such as the importance of exposure routes (inhalation, ingestion, skin/mucous membrane contact), the role of dose and host susceptibility, or the need for layered controls rather than relying solely on PPE. The best choice is the one that groups only true statements together, giving a coherent picture of how biological hazards behave and how to mitigate them. Statements that claim universal immunity, a single transmission route for all hazards, or that controls are unnecessary would be false.