This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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There are 20 feet of blood vessels in each square inch of human skin.
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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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The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
