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Weapons of mass destruction (WMD) best portray the twisted use of technological achievements against the human species. Despite arm control efforts, WMD threat continues to exist and even proliferate. This in turn calls for improvement in defensive measures against this threat. The modern soldier is exposed to a number of chemical, biological, and radiological agents in military and peace operations, while civilians are mainly exposed to terrorist attacks. Regardless of origin or mode of action, WMDs and other noxious agents aim for the same -- to make an organism dysfunctional. Because their effects are often delayed, these agents are hard to spot on time and treat. This review presents a biomedical aspect of agents used in warfare and terrorism, including polonium-210, depleted uranium, salmonella, anthrax, genetically modified bacteria, cobweb-like polymer fibre, sarin, and mustard gas. [ABSTRACT FROM AUTHOR]