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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Alcohol acts as a diuretic. Eight ounces of water is needed to metabolize just 1 ounce of alcohol.