Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.