Jonas Salk’s Polio vaccine tested by Jonas Salk was given final approval by the US Food and Drug Administration.
The USDA formally declared that the vaccine was safe and effective with a 90% success rate.
Jonas Salk’s Polio vaccine tested by Jonas Salk was given final approval by the US Food and Drug Administration.
The USDA formally declared that the vaccine was safe and effective with a 90% success rate.