On the evening of March 26, 1953, on a CBS radio broadcast, a young doctor named Jonas Salk delivered some of the most hopeful words America had ever heard. He announced that he had successfully tested a vaccine against polio - a terrifying disease that had been crippling and killing children across the country every summer. For decades, parents had lived in dread of the polio epidemics that closed pools and movie theaters and packed hospitals with kids in massive iron lung machines that helped them breathe.
Salk, working at the University of Pittsburgh, had spent years developing his vaccine by growing the polio virus and then killing it, so the body could learn to fight off the real disease without getting sick. In 1954, more than 1.8 million American children - nicknamed "Polio Pioneers" - rolled up their sleeves to test his vaccine in the largest medical trial in history. On April 12, 1955, the results came back: the vaccine worked. Church bells rang across the country. Salk became an instant national hero, but he refused to patent his discovery, saying, "Could you patent the sun?"
Before Salk's vaccine, polio paralyzed around 15,000 American children each year. Within a decade of the vaccine's introduction, that number dropped to just a few dozen. Albert Sabin then developed an oral version that was even easier to give. Today, polio has been wiped out almost everywhere on Earth, surviving in only a couple of countries, and global health teams are working to eliminate it completely. The radio announcement of March 26, 1953, didn't just announce a medicine - it announced that one of childhood's greatest fears was about to disappear.
