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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

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The longest a person has survived after a heart transplant is 24 years.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

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