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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The average office desk has 400 times more bacteria on it than a toilet.