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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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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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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.