Which category comprises agents designed to cause disease and produce flu-like symptoms?

• A. Vesicants
• B. Blood agents
• C. Pulmonary agents
• D. Biological agents

Answer: (D)

Biological agents are organisms or toxins produced by living organisms that cause disease in people. They’re designed to make people sick and often start with flu-like symptoms such as fever, malaise, body aches, and coughing. This broad potential for infectious disease distinguishes them from other types of agents.

Vesicants cause skin and mucous membrane blistering rather than infection. Blood agents, like cyanide compounds, interfere with cellular respiration and produce rapid cardiovascular and CNS symptoms rather than a flu-like illness. Pulmonary agents irritate or damage the lungs, leading to coughing and breathing difficulties, but not the systemic infectious illness pattern typical of biological agents.