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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

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The National Institutes of Health have supported research into acupuncture. This has shown that acupuncture significantly reduced pain associated with osteoarthritis of the knee, when used as a complement to conventional therapies.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.

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Over time, chronic hepatitis B virus and hepatitis C virus infections can progress to advanced liver disease, liver failure, and hepatocellular carcinoma. Unlike other forms, more than 80% of hepatitis C infections become chronic and lead to liver disease. When combined with hepatitis B, hepatitis C now accounts for 75% percent of all cases of liver disease around the world. Liver failure caused by hepatitis C is now leading cause of liver transplants in the United States.

Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones Internal structures of main sequence stars, convection zones with arrowed cycles and radiative zones
Arteriogram of the left carotid artery and cerebral arteries. Arteriogram of the left carotid artery and cerebral arteries.
Cerebral Vascular Accident - Left Cerebral Vascular Accident - Left
Many ideologies stem from older theories. The ideas of the philosophers are simplified. Ideologies Many ideologies stem from older theories. The ideas of the philosophers are simplified. Ideologies
Transferring Sterile Objects Using Transfer Forceps Transferring Sterile Objects Using Transfer Forceps
Didinium, a barrel-shaped ciliate with tufts of cilia, catching (left) and engulfing (right) Paramec Didinium, a barrel-shaped ciliate with tufts of cilia, catching (left) and engulfing (right) Paramec
Video: Cellular defenses (natural killer cells, phagocyte types & process of phagocytosis)

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