5.Who among the following is best known for his discovery and development of the first safe and effective polio vaccine.? [A] Jonas Salk [B] David Bodian [C] Almroth Wright [D] Albert Sabin Show Answer
On March 26, 1953, American medical researcher Dr. Jonas Salk announces on a national radio show that he has successfully tested a vaccine against poliomyelitis, the virus that causes the crippling disease of polio.
