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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.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
There are more bacteria in your mouth than there are people in the world.
Did you know?
There are 60,000 miles of blood vessels in every adult human.
Did you know?
The longest a person has survived after a heart transplant is 24 years.