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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
The longest a person has survived after a heart transplant is 24 years.
The average adult has about 21 square feet of skin.
Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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