Experts warn that flavored e cigarettes can cause irreversible lung damage, as seen in a U.S. teenager who developed "popcorn lung"a severe and permanent condition called bronchiolitis obliteransafter secretly vaping for three years. Effects of ecigarettes and vaping devices on cardiac and pulmonary physiology Tsai 2020 The Journal of Physiology Wiley Online Library How Smoking vs Vaping Affects Your Lungs You Must See This ! ! E cigarette, or vaping, product use associated lung injury: a review Pneumonia Springer Nature Link Health effects and known pathology associated with the use of E cigarettes ScienceDirect E cigarettes cause lung condition known as EVALI : Revista Pesquisa Fapesp