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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.