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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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There are more sensory neurons in the tongue than in any other part of the body.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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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.
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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.