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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.
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The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.