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Did you know?
Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.
Did you know?
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.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The longest a person has survived after a heart transplant is 24 years.
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The familiar sounds of your heart are made by the heart's valves as they open and close.