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E-cigarettes (a.k.a. vaporizers or vapes) aren't necessarily a safe substitute for the real thing. Smoking tobacco-free e-cigarettes still damages the users' DNA, increases the rate of genetic mutations, and raises the risk of cancer, according to a new study published in Proceedings of the National Academy of Sciences and spotted by Technology Networks. Researchers from New York University School of Medicine exposed the mice to smoke for three months, and then examined their DNA. They found adducts, a form of DNA damage in which a piece of the genetic material bonds to a chemical. [...]