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In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
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Hyperthyroidism leads to an increased rate of metabolism and affects about 1% of women but only 0.1% of men. For most people, this increased metabolic rate causes the thyroid gland to become enlarged (known as a goiter).
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
![When the United States gets stuck over a controversial issue—usually something a divided Congress ca](https://biology-forums.com/gallery/47/medium_262797_12_08_15_1_37_16_22180672.png)
![Dewey and the reformers attacked classes, such as this one, circa 1900, where students sat up straig](https://biology-forums.com/gallery/47/medium_376716_26_08_15_11_14_03_224292294.jpeg)