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__ [] __ Banned by the Geneva Protocol  Introduced in 1925    Furthered restricted by the Biological Weapons and Toxins Convention Introduced in 1972 Are made with living organisms Germs are used most often Biological warfare is extreamly old Some signers of the Geneva Protocol ignore it due to fear of other nations that didn't sign it Biological weapons will attack anything Producing it in populated areas can pose a great risk to civilians