Blood of man who subjected himself to 200 snakebites used for antivenom

Scientists have used the blood of a truck driver who injected himself with snake venom 856 times to create a potential antivenom against some of the world’s most dangerous snakes.
Beginning in 2000, Tim Friede spent the next 18 years slowly building up a tolerance to the venom of a range of snakes by injecting himself with over 800 diluted venom solutions and as well as deliberately subjecting himself to 200 bites from live snakes.