Edward+Jenner

Ian M. and Derick K. 1. Jenner’s contributions were the development of the smallpox vaccine. 2. The experiment that Jenner performed was that he took a cowpox blister material and put it into an eight year old which made him immune to smallpox 3. His experiment was an accidental discovery in which he experimented on further 4. He didn’t develop a theory but what he did discover is now the basis of immunity.

http://en.wikipedia.org/wiki/Edward_Jenner