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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Serum cholesterol testing in adults is recommended every 1 to 5 years. People with diabetes and a family history of high cholesterol should be tested even more frequently.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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According to the American College of Allergy, Asthma & Immunology, more than 50 million Americans have some kind of food allergy. Food allergies affect between 4 and 6% of children, and 4% of adults, according to the CDC. The most common food allergies include shellfish, peanuts, walnuts, fish, eggs, milk, and soy.