Why Does Garlic Kill Vampires?

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We're guessing this isn't a situation you've ever found yourself in, but if you were trapped by Dracula with only a bulb of garlic for protection, wouldn't it be nice to know for certain that it would work? A 1994 study set out to determine that once and for all (using leeches in lieu of vampires). Other theories say garlic's undead-repelling power has its basis in some reality—after all, why would it appear in vampire myths from Greece to China?

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