Scientists have created what they believe to be the most broadly effective antivenom to date — and its key ingredient came from a single man's blood. Both the researchers and the donor reveal how it all came together.

Scientists hope to make a universal antivenom from the extraordinary blood of a man exposed to snake venom for decades.

Scientists have created an antivenom that has shown promise against some of the world's deadliest snakes after collecting antibodies from a hyperimmune man who exposed himself to their toxins