Today, 73 years ago, on March 26, 1952 (March 1, 1952), Solk brought the gospel for the prevention of polio. On March 26, 1952, Solk worked in the lab of Pittsburgh for the prevention of polio. On March 26, 1952, a polio-preventive vaccine had been successfully tested on 90 adults and children. The cultivator of the vaccine was Dr. Jonathan-Solk of the University of Pittsburgh. The vaccine was used to kill this terrifying pathogenic bacterium. The results showed that the vaccine could be used to prevent the infestation of all three polio-inflammatory bacteria. Solk's report was published in the Journal of the American Medical Society. Solk's report said the experiment's results were encouraging. But the results did not find a very practical vaccine currently. It is also necessary