Polio vaccine The results of the field trial were announced 12 April 1955 (the tenth anniversary of the death of President Franklin D. Roosevelt, whose paralytic illness was generally believed to have been caused by polio). The Salk vaccine had been 60–70% effective against PV1 (poliovirus type 1), over 90% effective against PV2 and PV3, and 94% effective against the development of bulbar polio. Soon after Salk's vaccine was licensed in 1955, children's vaccination campaigns were launched. In the U.S, following a mass immunization campaign promoted by the March of Dimes, the annual number of polio cases fell from 35,000 in 1953
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