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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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Your heart beats over 36 million times a year.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.