Are E-Cigarettes Really Safe?

Electronic cigarettes (e-cigarettes) might help people quit smoking; however, their effect on lung cancer risk remains unclear (see Figure 1). To explore the association between e-cigarette use and lung cancer, researchers conducted a retrospective cohort study of 4.5 million current and ex-smokers in the Korean national health insurance program. The investigators used 2018 survey data to define baseline smoking and e-cigarette use, and they examined lung cancer outcomes through 2023.