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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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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.