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 Hall Roosevelt's Public Works Administration. The 225-bed hospital was originally part of the Medical Center associated with the University and was intended to be used primarily to treat communicable diseases. However, when antibiotics virtually eliminated the need to quarantine patients, the building had become a financial burden on the city. Therefore, in September 1949, work began on remodeling the building, and it temporarily housed Pitt's School of Public Health. In October 1957, the Municipal Hospital was formally acquired from the city for $1.3 million ($ million today) and renamed Jonas Salk Hall. For a time, the upper floors of the building