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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.
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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).