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

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