Dark Beaver- Everything I've read about Jonas Salk and the Salk vaccine is contrary to what you say. See the following exerpt from Wikipedia
In 1954, the vaccine was tested at Arsenal Elementary School and the
Watson Home for Children in
Pittsburgh, Pennsylvania. Salk's vaccine was then used in a test called the Francis Field Trial, led by
Thomas Francis; the largest medical experiment in history. The test began with some 4,000 children at Franklin Sherman Elementary School in
McLean, Virginia, and would eventually involve 1.8 million children, in 44 states from
Maine to
California.
[21] By the conclusion of the study, roughly 440,000 received one or more injections of the vaccine, about 210,000 children received a
placebo, consisting of harmless
culture media, and 1.2 million children received no vaccination and served as a control group, who would then be observed to see if any contracted polio.
[13] The results of the field trial were announced April 12, 1955 (the tenth anniversary of the death of
Franklin D. Roosevelt; see
Franklin D. Roosevelt's paralytic illness). 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.
[22] 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 to 5,600 by 1957.
[23] By 1961 only 161 cases were recorded in the United States.
[24]