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Did you know?
Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.