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Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
Did you know?
Everyone has one nostril that is larger than the other.
Did you know?
Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.