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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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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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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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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.