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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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Medication errors are three times higher among children and infants than with adults.
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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.
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The average adult has about 21 square feet of skin.