While the attacks were mostly personal, and not worthy of expounding here, the shred of substance was that more recent studies which compared lung cancer risks of successive cohorts of smokers have found increased risk among more recent cohorts. From these studies, the Surgeon General's report - and these co-authors - conclude that filters must convey an increased risk of cancer.

The commentaries by the two former tobacco industry consultants, university professors at a major midwestern medical school, are not in any way pro-tobacco, although they do criticize a number of current anti-smoking initiatives because they are ineffective and not based on sound formative research.

According to the interview transcript, Dr. Frieden told the public: "I certainly see the theory that they could be helpful and I've heard some anecdotes about individuals who say they have helped them quit. But much more importantly is the actuality that right now we're getting millions of kids experimenting with or using regularly e-cigarettes. We're getting smokers who are perhaps using them not to quit but to keep smoking regular cigarettes. We're seeing large numbers of ex-smokers going back to nicotine products for the first time in years using e-cigarettes. We're seeing the re-glamorization of smoking as an act. And we're also seeing potential exposure of nonsmokers, including pregnant women, to the nicotine in e-cigarette products. So I see theoretical potential benefits but definite harms occurring."

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