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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
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In 2006, a generic antinausea drug named ondansetron was approved. It is used to stop nausea and vomiting associated with surgery, chemotherapy, and radiation therapy.
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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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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.