Virus
smallpox
smallpox
smallpox
One potential biological warfare agent that is a virus is smallpox. It is highly contagious and has the ability to cause severe illness and high mortality rates within populations. Its aerosolized form can potentially be used as a weapon to infect large numbers of people.
In the Xbox and PlayStation games Splinter Cell Pandora Tomorrow, ND133 is a biological agent much similar to smallpox. That, or the ND133 is the storage device used to carry the smallpox virus.
Bacterium
One biological agent that is not typically considered by terrorists for mass destruction of people is the smallpox virus. This is because smallpox has been eradicated through global vaccination campaigns and the virus is only known to exist in two highly secure laboratories, making it inaccessible to terrorists.
prion
prion
Acid
A biological agent
prion