first polio vaccine

first polio vaccine Essay Examples

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A Biography of Jonas Salk, the Developer of the First Polio Vaccine (371 words, 1 pages)
Jonas Salk developed the first polio vaccine. As a student, Salk became interested in vaccines. At the time it had been believed that bacterial vaccines could be made from a preparation of dead bacteria, which would immunize without inducing an infection. But scientists believed that a live vaccine had to ... Read More
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