Cannabis vaping elicits transcriptomic and metabolomic changes involved in inflammatory, oxidative stress, and cancer pathways in human bronchial epithelial cells American Journal of Physiology Lung Cellular and Molecular Physiology American Pilot Study Shows Even Short Term 'Vaping' Causes Inflammation in Non Smokers Be A Vape Free Teen Cecil County Health Department The safest vape is the one you never start. Flavoured vapes were designed to feel harmless: Candy taste. Fruit smell. Cool packaging. Viral aesthetics. But your lungs don't care about the flavour.