Dr. Jonas Salk developed a vaccine for which crippling disease?
On this day in 1953, medical researcher Dr. Jonas Salk announced on a national radio that he successfully tested a vaccine against the virus that causes the crippling disease of polio. Polio, a disease that has affected humanity throughout recorded history, attacks the nervous system and can cause varying degrees of paralysis. There is still no cure for polio once it has been contracted, but the use of vaccines has virtually eliminated polio in the United States. Globally, there are now around 250,000 cases each year, mostly in developing countries.
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