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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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The average adult has about 21 square feet of skin.
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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.