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Did you know?
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.
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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.
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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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There are 20 feet of blood vessels in each square inch of human skin.