He started by injecting himself with small doses of snake venom and then slowly increased the amount to try to build up tolerance. He would then let snakes bite him.

He started by injecting himself with small doses of snake venom and then slowly increased the amount to try to build up tolerance. He would then let snakes bite him.

Around 110,000 people die from snakebite every year, according to the World Health Organization. Making antivenom is expensive and difficult.

Stock image: A snake biting a man's finger. iStock / Getty Images Plus Snake envenomation, which was added to the World Health Organization's list of neglected tropical diseases in 2017, causes ...

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He started by injecting himself with small doses of snake venom and then slowly increased the amount to try to build up tolerance. He would then let snakes bite him.