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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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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.
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HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.