E-cigarettes and health — here's what the evidence actually says

Stepping into the health debate around electronic cigarettes is a messy and frustrating exercise. Depending on whom you ask, these devices are either the best technological solution to the smoking pandemic or the biggest looming threat to public health. So to sort through the research and figure out whether e-cigarettes are actually safe, I read through more than 60 studies, articles, and reviews, and interviewed nine researchers and health experts about their work.
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