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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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There are more bacteria in your mouth than there are people in the world.
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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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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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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.