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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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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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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.