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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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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.