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If current age trends persist, with todays young adults continuing to vape as they age and future generations adopting vaping at high rates, e-cigarette use may eventually surpass traditional cigarette smoking

Of those adults who reported using e-cigarettes in 2019, 36.9% also currently smoked cigarettes, 39.5% formerly smoked cigarettes, and 23.6% had never smoked cigarettes

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Cannabis, or weed, is a psychoactive drug that some people use for medical or recreational purposes

The overall conclusion reported by PM in these four papers was that, The statistically significant changes detected in some of the parameters measured in these studies were considered incidental, without influence on the overall biological effects normally seen with cigarette smoke exposure

[10] These manufacturing differences affect the way e-cigarettes convert the liquid solution to an aerosol, and thus the levels of ingredients, that are delivered to the user and the surrounding air for any given liquid