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Did you know?
There are more bacteria in your mouth than there are people in the world.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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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.