Jonas Salk was an amazing medical researcher who became a real-life superhero! Back when your grandparents were little, there was a scary sickness called polio that made many children very sick and unable to walk. Jonas wanted to stop this sickness, so he spent seven years working day and night in his laboratory to find a way to protect people!
In 1955, Jonas shared his incredible invention with the world: the very first polio vaccine! A vaccine is like a special medicine that teaches your body how to fight off germs before they can make you sick. The best part is that Jonas didn’t even ask for money for his invention because he wanted every child in the world to be safe! Thanks to his hard work, polio is almost completely gone today!
