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Vaccines prevent between 2.5 and 4 million deaths every year.
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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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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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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.