Our immune systems are affected by everything from feeling hungry to our age. Exercise, a good diet, vaccines and sleep all help
Tim Friede, a US truck mechanic turned self-taught snake expert, has what has been described as “super immunity” to snake venom: he has been bitten more than 200 times over nearly two decades by some of the world’s most poisonous snakes.
How did he develop immunity to snake venom that should kill a human in minutes?
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