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
Vaccine: The Controversial Story of Medicine's Greatest Lifesaver possess the virus. It then describes how this vaccine was only slightly different from the type invented by Edward Jenner two centuries earlier, which was so successful that smallpox became the first and only disease to ever be eradicated. Vaccine developers profiled in the book include Jonas Salk (p. 188) and Maurice Hilleman (p. 238). Allen, later in the book, describes the controversy over vaccines and autism and the founding of SafeMinds, writing, "The vaccines-cause-autism mindset was the product of a set of assumptions that were impossible to completely prove or disprove." (p. 374) It also discusses how preliminary study