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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
The human body produces and destroys 15 million blood cells every second.
There are 20 feet of blood vessels in each square inch of human skin.
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