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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 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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Atropine was named after the Greek goddess Atropos, the oldest and ugliest of the three sisters known as the Fates, who controlled the destiny of men.