Which type of agent is used to cause disease and commonly presents with fever and flu-like symptoms?

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

Answer: (C)

Biological agents are designed to cause disease in living beings. They include pathogens such as bacteria or viruses, or their toxins. Exposure often leads to illness that starts with fever and flu-like symptoms—fever, chills, fatigue, body aches, cough, and sore throat—as the body mounts an immune response. This pattern helps distinguish them from other types: vesicants cause skin blisters, not systemic infection; pulmonary agents mainly irritate or damage the lungs quickly without the infectious-fever pattern; and blood agents disrupt cellular respiration and produce rapid, severe symptoms that aren’t typical of an infectious illness with fever. So, the presentation of fever and flu-like symptoms tied to a disease-causing agent points to a biological agent.