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
The Immune Response Corporation The Immune Response Corporation The Immune Response Corporation (IRC), founded by Jonas Salk and Kevin Kimberlin and based in Carlsbad, California, pioneered immunotherapeutic products. Francis Crick once said about Salk, “Few have made one discovery that has benefited humanity so greatly. Jonas was a man who, right to his last day, was actively in pursuit of another.” That pursuit was The Immune Response Corporation. Kimberlin “asked Salk to become lead scientific advisor for a new biotech company specializing in ‘anti-idiotypes,’ a novel vaccine technology.” Salk called the proposal “liberating.” The management team included CEO Jim Glavin, former CEO of Genetic