In 1956, Dr. Albert Sabin reported that the oral polio vaccine he had developed was ready for mass testing on an international basis. It was expected to produce long-term, perhaps lifetime, immunity against the dreaded disease. Sabin said a single dose of the new vaccine would produce immunity against all three major strains of polio virus. His vaccine with live polio virus had proven safe in extensive tests on animals and humans. Worldwide tests of the new vaccine were slated to begin in the following year in the U.S. and four foreign countries. Sabin said arrangements had been made for a phamaceutical company to produce the vaccine, which he said would lost less than the cherry syrup it was in when administered by mouth. It brought an alternative to the older hyperdermic method and resulting scars.« Jonas Salk: Beyond the Microscope, by Victoria Sherrow. - book suggestion.