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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Medication errors are three times higher among children and infants than with adults.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
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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.