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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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There are approximately 3 million unintended pregnancies in the United States each year.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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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.