Poliomyelitis leading to large-scale trials in the then Belgian Congo and the vaccination of seven million children in Poland against serotypes PV1 and PV3 between 1958 and 1960. The second inactivated polio virus vaccine was developed in 1952 by Jonas Salk at the University of Pittsburgh, and announced to the world on 12 April 1955. The Salk vaccine, or inactivated poliovirus vaccine, is based on poliovirus grown in a type of monkey kidney tissue culture (vero cell line), which is chemically inactivated with formalin. After two doses of inactivated poliovirus vaccine (given by injection), 90 percent or more of individuals develop
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