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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Cyanide works by making the human body unable to use oxygen.
Vaccines prevent between 2.5 and 4 million deaths every year.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
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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