Edward Jenner is described as the ‘father of immunology’ as he is known for his contribution to immunization and fighting against the deadly disease, small pox. He created the first immunity against the deadly disease in the late 1700’s, which saved thousands of lives in a matter of years. His procedures used other diseases to fight against the small pox disease. He is referred to as the father of immunology as he saved more lives than any other human has. He produced a technique which was safer, mostly painless and more effective than the traditional type of protection. With studying small pox he noticed a connection with milk maids in the country side never seemed to get infected with small pox but contracted the usually harmless mild case of cow pox disease. In 1796 he took puss from a milk maid which had contracted cow pox and then gradually put the puss into a boy’s arm. Which after a few days seemed to have gotten immunity against small pox. He continued to experiment with this, and soon spread the word of this new technique across the country. His vaccination changed the medical history forever. Edwards’s contribution significantly decreased the mortality rate caused by the small pox disease.