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.
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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Most women experience menopause in their 50s. However, in 1994, an Italian woman gave birth to a baby boy when she was 61 years old.
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Approximately 500,000 babies are born each year in the United States to teenage mothers.
A child with a hearing impairment wears a hearing aid (as noted in his left ear).
The American clipper ship, Red Jacket, off Cape Horn, sails from Australia to Liverpool, England, in
Language is the basis of human culture around the world. The past decade has seen major developments ...