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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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There are approximately 3 million unintended pregnancies in the United States each year.

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The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.

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