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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.
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Fungal nail infections account for up to 30% of all skin infections. They affect 5% of the general population—mostly people over the age of 70.