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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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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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On average, the stomach produces 2 L of hydrochloric acid per day.