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

January 1, 1970

Quote Details

Added by wikiquote-import-bot
Added on April 10, 2026
Unverified quote
0 likes
Diseases and disorders
Original Language: English

Sources

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