Harris et al., in perhaps the most comprehensive and definitive on this issue, found a clear increase in cancer risk associated with non-filtered cigarettes. As they reported: "Compared with smokers of medium tar (15-21 mg) filter cigarettes, risk was higher among men and women who smoked high tar (> or = 22 mg) non-filter brands (hazard ratio 1.44, 95% confidence interval 1.20 to 1.73, and 1.64, 1.26 to 2.15, respectively)."

In this cross-sectional study, a sample of adults who smoked at any point in the past 12 months was identified from a national household survey conducted in England between 2009 and 2014. Criteria for inclusion in the study were: (1) having made a serious quit attempt in the past year; (2) having used e-cigarettes alone, NRT alone, or an unaided quit attempt during their most recent quit attempt; and (3) not having used a prescription cessation drug or behavioral counseling during their most recent quit attempt.

The report issued by these lawmakers calls for a ban on flavors in e-cigarettes.

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