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Voices: Are e-cigs bad for you? I’m not sure.

Are e-cigarettes a savior for smokers, a lurking global danger … or both?

You might think I’d know. After all, I’m director of the Institute for Global Tobacco Control at the Johns Hopkins Bloomberg School of Public Health. I’ve been involved in tobacco policy research for more than two decades, studying everything from what helps people quit smoking to how tobacco policy is made to how tobacco is packaged. I was recently a voting member on the Food and Drug Administration’s Tobacco Products Scientific Advisory Committee.

Yet I can’t — with any degree of certainty — say e-cigarettes are good or bad.