Archive note — September 2026: This 2019 report covers a randomized cessation study. Current guidance is more precise: in the United States, no e-cigarette is FDA-approved as a smoking-cessation aid, and the CDC says any possible benefit for adults who smoke depends on complete substitution for combustible cigarettes, not dual use. The UK NHS says e-cigarettes can help some adults quit smoking, but emphasizes complete switching and does not recommend them for non-smokers. See the CDC and NHS for current guidance.
Original February 2019 report
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