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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
Vaccines prevent between 2.5 and 4 million deaths every year.
Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
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