Exposure to a weaponized blister agent can cause a number of life-threatening symptoms, including:
All blister agents currently known are heavier than air, and are readily absorbed through the eyes, lungs, and skin. Effects of the two mustard agents are typically delayed: exposure to vapors becomes evident in 4 to 6 hours, and skin exposure in 2 to 48 hours. The effects of
http://www.answers.com/topic/lewisite are immediate.