Hilary Koprowski he is chair of the department of radiation oncology at Christiana Hospital in Delaware. While at Lederle Laboratories, Koprowski created the world's first polio vaccine, based on an orally administered attenuated polio virus. In researching a potential polio vaccine, he had focused on live viruses that were attenuated (rendered non-virulent) rather than on killed viruses (the latter became the basis for the injected vaccine subsequently developed by Jonas Salk). Koprowski viewed the live vaccine as more powerful, since it entered the intestinal tract directly and could provide lifelong immunity, whereas the Salk vaccine required booster shots. Also, administering a vaccine
Salk Institute for Biological Studies Elizabeth Blackburn, Sydney Brenner, and Roger Guillemin. Three of Salk's 11 Nobel laureates are now deceased: Francis Crick, Robert W. Holley, and Renato Dulbecco. Another five scientists trained at Salk have gone on to win Nobel prizes. The institute is organized into several research units, each of which is further composed of several scientific groups, each led by a member of the faculty. Some of these units are: Elizabeth Blackburn is the President of the Salk Institute since 1 January 2016. Edward Callaway is the chair of the academic council. There are 56 faculty members. Six of these are members