Biological warfare

Biological warfare refers to the use of living organisms, mostly microbes such as bacteria and viruses, to kill or harm enemies in war. A weapon system designed to deliver such organisms to targets or to produce organisms for use in warfare is known as a biological weapon. Biological weapons have been use since the Middle Ages in methods such as throwing corpses from victims of plagues into castles and towns during sieges.

Biological Warfare and Weapons in Science Fiction

• In Babylon 5 the Drakh used bioweapons against Earth.
• In the Warhammer 40,000, the Imperium of Man has access to virus bombs that it can use in Exterminatus operations.
• In Mass Effect, the salarians and turians used the genophage to defeat the krogan in the Krogan Rebellions.