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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
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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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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.