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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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Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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More than nineteen million Americans carry the factor V gene that causes blood clots, pulmonary embolism, and heart disease.