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The popularity of electronic cigarettes continues to grow worldwide, as many people view them as a safer alternative to smoking. But the long-term effects of e-cigarette usage, commonly called "vaping," are unknown. Today, researchers report that vaping may modify the genetic material, or DNA, in the oral cells of users, which could increase their cancer risk. [...] "E-cigarettes are a popular trend, but the long-term health effects are unknown," says Romel Dator, Ph.D., who is presenting the work at the meeting.