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Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Illicit drug use costs the United States approximately $181 billion every year.
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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.