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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 4.4billion prescriptions were dispensed within the United States in 2016.
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.