The antitoxin antibodies found in the blood of a Wisconsin man—who voluntarily let snakes bite him for alm0st 20 years—is helping scientists create better antivenom drugs for snakebites. Every year, snake bites cause between about 80,000 and 100,000 deaths worldwide, and leave around 300,000 others with disabilities. However, this prevalent fear isn’t an issue for Tim Friede, who has spent two decades voluntarily letting hundreds of deadly venomous snakes bite him. Then, once sufficiently immune, Friede had the snake bite him directly to test his immunity. Centivax created the cocktail by combining two of Friede’s antibodies (called LNX-D09 and SNX-B03) with a toxin-blocking drug called varespladib.