U.S. National Library of MedicineNational Institutes of Health
Skip navigation
MedlinePlus Trusted Health Information for You MedlinePlus Trusted Health Information for You MedlinePlus Trusted Health Information for You
  FAQs Site Map About MedelinePlus Contact Us
español

Printer-friendly version E-mail this page to a friend
Photograph of a scientist wearing protective gear working at a lab bench

Terrorism refers to the use or threat of force or violence against people or property. A bioterrorist attack releases viruses, bacteria, or other germs to cause illness or death. These biological agents are typically found in nature. But they can sometimes be made more harmful by increasing their ability to cause or spread disease, or to resist medical treatment.

Biological agents spread through the air, water or in food. They can be very hard to detect, and they don't cause illness for several hours or days. Some agents can also be spread from person to person. Scientists worry that anthrax, botulism, hemorrhagic fever viruses such as Ebola, plague, or smallpox could be used as biological agents.

Biodefense involves medical measures to protect people against biological agents. This means medicines and vaccinations. It also means medical research and preparations to defend against bioterrorist attacks.

Centers for Disease Control and Prevention

Start Here