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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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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.
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During pregnancy, a woman is more likely to experience bleeding gums and nosebleeds caused by hormonal changes that increase blood flow to the mouth and nose.
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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.