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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.
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Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.