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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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Cytomegalovirus affects nearly the same amount of newborns every year as Down syndrome.
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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
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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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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.