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Vaccines prevent between 2.5 and 4 million deaths every year.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The calories found in one piece of cherry cheesecake could light a 60-watt light bulb for 1.5 hours.
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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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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.