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Did you know?
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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There are 20 feet of blood vessels in each square inch of human skin.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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The longest a person has survived after a heart transplant is 24 years.