The polio vaccine. Jonas Salk was the discoverer of the polio vaccine. After graduating from New York University, Salk specialized in bacteriology at the University of Michigan, where he served as a researcher. In 1953, he completed the preparation of the polio vaccine, composed of viruses killed by formalin and effective with a simple injection. Just one year after its discovery, 400,000 children were vaccinated against the then-terrible disease.
