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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Approximately 500,000 babies are born each year in the United States to teenage mothers.
According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
The average adult has about 21 square feet of skin.
There are approximately 3 million unintended pregnancies in the United States each year.
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