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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
Did you know?
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.