Polio vaccine incidents reduced public confidence in polio vaccine leading to a drop in vaccination rates. At the same time that Salk was testing his vaccine, both Albert Sabin and Hilary Koprowski continued working on developing a vaccine using live virus. During a meeting in Stockholm to discuss polio vaccines in November 1955, Sabin presented results obtained on a group of 80 volunteers, while Koprowski read a paper detailing the findings of a trial enrolling 150 people. Sabin and Koprowski both eventually succeeded in developing vaccines. Because of the commitment to the Salk vaccine in America, Sabin and Koprowski both did their
Salk Hall served as a residence for students. Pitt remodeled it to house the School of Dental Medicine and School of Pharmacy in 1961-1962. The Salk Hall Annex, a major renovation and three-story addition designed by the architectural firm Deeter, Ritchey, and Sippel for the Dental School, was completed the Terrace Street side of the building in 1967 for a cost of over $5 million ($ million today). Today, it serves as a main entrance for Salk Hall and the dental clinics. A new $50.6 million ($ million today) addition and renovation to Salk Hall was announced in January 2010. It will