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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
The liver is the only organ that has the ability to regenerate itself after certain types of damage. As much as 25% of the liver can be removed, and it will still regenerate back to its original shape and size. However, the liver cannot regenerate after severe damage caused by alcohol.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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The longest a person has survived after a heart transplant is 24 years.
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The average adult has about 21 square feet of skin.