Frank Fenner, co-inventer of 20th Century Immunology

Sometimes you don’t realize how important a person is until you look back at their life: Frank Fenner just passed away. Fenner was one of the discoverers of the immune response system, a key figure in the development and deployment of multiple vaccines, and someone who integrated environmental and biological science at a very high level. The complete eradication of smallpox from human populations, our first complete victory over an infectious disease, was in large part his work.