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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.