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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
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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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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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Asthma cases in Americans are about 75% higher today than they were in 1980.
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Interferon was scarce and expensive until 1980, when the interferon gene was inserted into bacteria using recombinant DNA technology, allowing for mass cultivation and purification from bacterial cultures.