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Did you know?
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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Cyanide works by making the human body unable to use oxygen.
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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.
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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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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.