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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
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).
Did you know?
Stroke kills people from all ethnic backgrounds, but the people at highest risk for fatal strokes are: black men, black women, Asian men, white men, and white women.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.