Los Angeles County has emergency response plans in case of chemical, biological or nuclear attack and other disasters. Practical drills and exercises are conducted on a regular basis. Emergency response plans bring together many agencies, including law enforcement, health, fire departments, and other local and federal agencies. The following information is designed to help answer questions you may have about terrorist attacks with a special focus on bioterrorism. Bioterrorism (BT) is the use of biological agents to cause illness to meet terrorist aims. Bioterrorism agents include living microorganisms (bacteria, protozoa, viruses, and fungi) and toxins (chemicals) made by microorganisms, plants or animals.