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In 1864, the first barbiturate (barbituric acid) was synthesized.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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Thyroid conditions may make getting pregnant impossible.
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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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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.