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Multiple experimental evidences have confirmed that at the molecular level, cancer is caused by lesions in cellular DNA.
A seasonal flu vaccine is the best way to reduce the chances you will get seasonal influenza and spread it to others.
Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.