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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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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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The people with the highest levels of LDL are Mexican American males and non-Hispanic black females.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.