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Did you know?
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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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.