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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.

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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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