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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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An identified risk factor for osteoporosis is the intake of excessive amounts of vitamin A. Dietary intake of approximately double the recommended daily amount of vitamin A, by women, has been shown to reduce bone mineral density and increase the chances for hip fractures compared with women who consumed the recommended daily amount (or less) of vitamin A.

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It is difficult to obtain enough calcium without consuming milk or other dairy foods.

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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Pancreatitis. Inflammation of the pancreas may be the result of a bacterial infection, trauma, or ch Pancreatitis. Inflammation of the pancreas may be the result of a bacterial infection, trauma, or ch
Infection prevention and control Infection prevention and control
Chain of Infection Chain of Infection
The unwinding and replication of bacterial DNA. The unwinding and replication of bacterial DNA.
Sources of hepatitis C infection. Sources of hepatitis C infection.
Typical bacterial size and structure Typical bacterial size and structure
Video: Pressure volume relationships - Normal inspiration and expiration

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