National Health & Safety Only 1 human disease has ever been completely eradicated: Smallpox 5:12pm May 19, 2022 by Joe Richman Health History National Share URL copied to clipboard! Copyright 2022 NPR. To see more, visit https://www.npr.org. 300x250 Ad More All Things Considered Human Interest The search into Pope Leo's family roots by Tinbete Ermyas National Supreme Court faces new headwinds with roughly two weeks left in the term by Nina Totenberg 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate