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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
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People about to have surgery must tell their health care providers about all supplements they take.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.