Jonas Salk
Overview
Jonas Edward Salk was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 medical researcher and virologist, best known for his discovery and development of the first safe and effective polio vaccine
Polio vaccine
Two polio vaccines are used throughout the world to combat poliomyelitis . The first was developed by Jonas Salk and first tested in 1952. Announced to the world by Salk on April 12, 1955, it consists of an injected dose of inactivated poliovirus. An oral vaccine was developed by Albert Sabin...

. He was born in New York City
New York City
New York is the most populous city in the United States and the center of the New York Metropolitan Area, one of the most populous metropolitan areas in the world. New York exerts a significant impact upon global commerce, finance, media, art, fashion, research, technology, education, and...

 to parents from Ashkenazi Jewish Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...

n immigrant families. Although they themselves did not have much formal education, they were determined to see their children succeed. While attending New York University School of Medicine
New York University School of Medicine
The New York University School of Medicine is one of the graduate schools of New York University. Founded in 1841 as the University Medical College, the NYU School of Medicine is one of the foremost medical schools in the United States....

, he stood out from his peers not just because of his academic prowess, but because he chose to do medical research instead of becoming a physician.

Until 1955, when the Salk vaccine was introduced, polio was considered the most frightening public health problem of the post-war United States
History of the United States (1945–1964)
For the United States, 1945 to 1964 was an era of economic growth and prosperity which saw the victorious powers of World War II confronting each other in the Cold War and the triumph of the Civil Rights Movement that ended Jim Crow segregation in the South....

.
Quotations

It is courage based on confidence, not daring, and it is confidence based on experience.

On testing his vaccine against polio on himself, his wife, and his three sons (9 May 1955)

I feel that the greatest reward for doing is the opportunity to do more.

On receiving Congressional Medal for Distinguished Civilian Achievement (23 April 1956); several variations of this personal motto are often quoted, including:

Why did Wolfgang Amadeus Mozart|Mozart compose music?

Response when asked why he chose to do medical research rather than be a practicing physician, as quoted in The Polio Man : The Story of Dr. Jonas Salk (1961) by John Rowland, p. 23

Nothing happens quite by chance. It's a question of accretion of information and experience ... it's just chance that I happened to be here at this particular time when there was available and at my disposal the great experience of all the investigators who plodded along for a number of years.

As quoted in Breakthrough : The Saga of Jonas Salk (1966) by Richard Carter

Our greatest responsibility is to be good ancestors.

As quoted in Learning from the Future : Competitive Foresight Scenarios (1998) by Liam Fahey and Robert M. Randall, p. 332

I have dreams, and I have nightmares. I overcame the nightmares because of my dreams.

As quoted in Wisdom for the Soul: Five Millennia of Prescriptions for Spiritual Healing (2006) by Larry Chang

I have the impression that the new generation of young people, are coming up on the scene with a sense "ancestorhood", and with more wisdom than was evident before. I think this comes about as a matter of necessity — Almost as if there is something in us that is innate, something inherent in us, that is destined for a longer term, rather than a shorter term future.

 
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