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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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Green tea is able to stop the scent of garlic or onion from causing bad breath.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.