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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
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There are approximately 3 million unintended pregnancies in the United States each year.