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Did you know?
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 largest baby ever born weighed more than 23 pounds but died just 11 hours after his birth in 1879. The largest surviving baby was born in October 2009 in Sumatra, Indonesia, and weighed an astounding 19.2 pounds at birth.
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The longest a person has survived after a heart transplant is 24 years.
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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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The average adult has about 21 square feet of skin.