Persistent chemical agents, such as certain nerve agents and blister agents, can cause casualties for extended periods, from 24 hours to several weeks. These agents remain hazardous in the environment due to their stability and ability to contaminate surfaces and materials. Examples include agents like VX and mustard gas, which can linger and pose risks long after their initial release. Their prolonged effects make them particularly dangerous in warfare or terrorist scenarios.
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A biological agent typically refers to microorganisms or toxins that can cause disease in humans, animals, or plants. Examples include bacteria, viruses, fungi, and natural toxins. In contrast, physical agents like radiation or chemical agents such as pesticides are not classified as biological agents. Therefore, anything that falls outside of these biological categories, such as chemical or physical substances, is not considered a biological agent.
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You think probable to chemical weapons.