A dose of the Sabin vaccine could be put on a sugar cube with a dropper and it didn't require a professional to simply hand the cube to a child.
The vaccinators came to Dr.
Brodie tested the vaccine on himself and thousands of children volunteered by their parents.
The disease was officially eliminated in 36 Western Pacific countries, including China and Australia, in 2000.
Sabin's oral vaccine using live virus came into commercial use in 1961.
Within the next decade Salk founded the Salk Institute for Biological Studies in La Jolla, California.