'On October 6, 1956 Albert Sabin announced that his oral polio vaccine was ready
for testing.' From The Good News Network...
https://www.goodnewsnetwork.org/events061006/
"With the menace of polio growing, complicated by the fact that there were 3 different strains of the crippling disease, Jonas Salk developed a vaccine given by injection, but it was only effective in preventing complications of polio, and did not prevent the initial infection.
By carrying out autopsies of polio victims, Sabin was able to demonstrate that the poliovirus multiplied and attacked the intestines before it moved to the central nervous system. He developed an oral vaccine, to be put onto sugar cubes that stimulated antibody production. Recipients of his live attenuated oral vaccine included himself, family, and colleagues. The Polish-American medical researcher worked with Russian colleagues to prove its extraordinary effectiveness—and safety—as it worked in the intestines to block the poliovirus from entering the bloodstream.
snip
In the next five years, the oral vaccine was tested on at least 100 million people in the USSR, parts of Eastern Europe, Singapore, Mexico, and the Netherlands. In April 1960, the sugar cubes targeting three polio strains were given to 180,000 Cincinnati school children—and the mass immunization effectively eradicated polio in the Ohio city.
snip
Sabin’s vaccine soon became the predominant method of vaccination in the U.S. over the next three decades, breaking the chain of transmission and allowing for the possibility of eradication. Sabin, who also developed vaccines against encephalitis and dengue, refused to patent his polio vaccine, so its low cost would ensure widespread vaccination—and he never gained a penny. He was awarded the Presidential Medal of Freedom while continuing to live on his salary as a professor."
There's a little more text and pics at the link. I fondly remember the days when
nobody said a bad word about vaccines! In 1955 I received the Salk vaccine and
never got polio either. YAY!
= new reply since forum marked as read
had worn themselves out getting their revolutions trounced by unsympathic majorities in the 1920s-40s. They've since wound up for another round, including an opportunistic holocaust that hasn't gained them anything yet.
made it possible.... 
https://www.shortform.com/blog/hela-cells-and-polio-vaccine/
visibility! 
