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The human body produces and destroys 15 million blood cells every second.
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Colchicine is a highly poisonous alkaloid originally extracted from a type of saffron plant that is used mainly to treat gout.
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There are approximately 3 million unintended pregnancies in the United States each year.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.