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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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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
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Cyanide works by making the human body unable to use oxygen.
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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.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.