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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
There are more nerve cells in one human brain than there are stars in the Milky Way.
Signs and symptoms of a drug overdose include losing consciousness, fever or sweating, breathing problems, abnormal pulse, and changes in skin color.
Approximately 25% of all reported medication errors result from some kind of name confusion.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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