The use of blister agents has been known for over 150 years. Blistering agents are the most common chemical warfare agents and are also known as blisters. There are five known vesicants, namely sulfur mustard (HD), nitrogen mustard (HN), Lewisite (L), Lewisite mixture (HL), and phosgene oxime (CX). The two most well-known blister agents are sulfur mustard, also known as mustard gas, and Lewisite. It was once said that sulfur mustard was the blister agent most commonly associated with warfare and was in fact the leading cause of chemical casualties during World War I, although it was not used only during the last year of the war. (Smith, 2002). Sulfur mustard was first introduced by Germany in 1917. It caused 88 percent of deaths and was a significant factor in this specific disease affecting most of this specific geographic area. Sulfur mustard was also used during the Iraq-Iran War which took place from 1984 to 1987. During the Iraq-Iran War, there were between 40,000 and 150,000 casualties from chemical munitions. (Newmark, 2007). Sulfur mustard is a chemical agent that does not immediately affect the body. It has a period of one to eight hours during which a person may be affected. Depending on the length of exposure to sulfur mustard will determine how long it will take a person to recover from that exposure. It is imperative that medical personnel handling sulfur mustard victims protect themselves as they may also become victims. There are several reasons why sulfur mustard has been used in many cases. First, it was very effective. Second, it required the enemy to wear the necessary protective equipment. Third, forcing the enemy to wear certain protective equipment or additional protective equipment, this affects...... middle of paper ......r country. I believe that with the current technology and capabilities of so many countries, it is almost impossible to determine how far their studies go. Works Citedhttps://www.osha.gov/SLTC/emergencypreparedness/guides/blister.htmlFire, F. (2008). Blister agents: phosgene oxime. 161(7), 122-125. doi: 0015-2587Military medicine. February 2007, vol. 172 Number 2, p196-198. 3p.Military psychology (Taylor & Francis Ltd). April 2002, vol. 14 Number 2, p145-157. 13p. Smith, W. (2002). Vesicant agents and antivesicant medical countermeasures: clinical toxicology and psychological implications. 14(2), 145-157. Retrieved from http://web.a.ebscohost.com/ehost/detail?sid=2fc2fe83-3779-49ce-86ef-5f2ed9b0edc3@sessionmgr4005&vid=1&hid=4114&bdata=JnNpdGU9ZWhvc3QtbGl2ZQ==#db=mth&AN=6705502Taylor Jr. ., LBL (1992). Chemical and biological warfare. (Rev. ed. ed., pp... 26-29).