What makes a 'blood agent' chemical weapon particularly dangerous?

A 'blood agent' chemical weapon is particularly dangerous because it interferes with the body's ability to transport and utilize oxygen, leading to rapid cellular asphyxiation and potentially death within minutes. Blood agents, such as hydrogen cyanide (AC) and cyanogen chloride (CK), are absorbed into the bloodstream and inhibit the enzyme cytochrome oxidase, which is essential for cellular respiration. This prevents the cells from using oxygen, causing them to suffocate even though oxygen is present in the blood. The effects of blood agents are rapid and can be fatal at relatively low concentrations. Symptoms include rapid breathing, convulsions, and loss of consciousness, quickly leading to respiratory arrest and death. Because blood agents act systemically and disrupt a fundamental biological process, they are considered highly toxic and pose a significant threat even with prompt medical intervention. Their rapid action and potential for widespread casualties make them a particularly dangerous category of chemical weapon.