Bioterrorism agents are potential pathogenic organisms or biological toxins that can produce death and disease in humans, plants, or animals for terrorist purposes. These agents are usually naturally occurring microorganisms, but they have been modified to increase their virulence and make them resistant to antibiotics or vaccines. To enhance the ability of these agents to spread in the environment, terrorists believe that biological agents are an alternative to conventional weapons due to their low cost and accessibility. Any attempt to use bioterrorist agents, whether successful or unsuccessful, could cause widespread destruction of humanity along with the disruption of society at large. Bioterrorism has been around for much longer than many realize. In the 6th century BC the ergot mushroom was used to poison the wells of the enemies of the Assyrians. Smallpox, which some say began appearing in 10,000 BC, was used by the English in an act we know as bioterrorism. Smallpox victims would use blankets for warmth which would transmit the disease. The English would then pass these blankets to Native American tribes, drastically reducing their number and size. In the 1980s Salmonella was used to make many salad eaters sick. This was a process carried out by the followers of Bhagwan Shree Rajneesh. As life goes on, intelligence will improve, which means there will be better technologies and designs of bioterrorist agents. Researchers will constantly be looking for a way to stop any agent that could cause mass destruction in the future. Previous articles on bioterrorist agents have provided the basis for this continuing discussion of the classification system used to classify the threat that already exists... ... middle of paper ... and may have high morbidity and mortality. This would cause international disruption which could cause serious distress in the world. Nipah virus is one such agent grouped into category C. Nipah virus was an epidemic that occurred in Malaysia. This virus was contracted in humans by coming into direct contact with an infected swine host. This virus has not been documented in the United States, but has caused over a million deaths in Malaysia. The outbreak of this virus has been eradicated, but fruit bats are still prone to carrying the virus and possibly spreading the infection again. If this virus were to spread to other areas, there would be little that many could do. Since there isn't much research behind the virus, we don't know what could prevent or even cure some of the clinical symptoms associated with this virus.