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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.

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In 1844, Charles Goodyear obtained the first patent for a rubber condom.

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There are more sensory neurons in the tongue than in any other part of the body.

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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.

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The horizontal fraction bar was introduced by the Arabs.

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