Carter targeted diseases primarily affecting the poor in remote areas — notably "Guinea worm disease." Because of his commitment, case numbers plummeted from 3.6 million a year to just 13 in 2022.
The World Health Organization had hoped to eradicate the painful parasite by 2020. That deadline just got moved a decade into the future. And dogs are part of the problem.
Health officials thought they were close to wiping out the parasite. It's been President Carter's dream for decades. But the dogs of Chad have turned out to be a major problem.
Scientist Peter Hotez has spent nearly 40 years trying to treat and eliminate the diseases that worms can cause. And he won't let the "ick" factor stop him.
Tapeworms, hookworms, leeches. Millions of specimens. This collection has it all — except legs.
The former president tells why it's taken nearly 30 years to bring the Guinea worm to near extinction — and what's next on his agenda.