Sometimes when people vape for the first time they can feel quite unwell and, in some cases, they can actually be sick. This is due to the nicotine they're ingesting and is Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Youth vaping is rising and it's harming more than just lungs. 77% of young adults who vape never smoked cigarettes It impacts brain development, learning, and mental health Teens who vape are more likely to become teens who smoke and smoke more often Los Angeles Times