What Does Vaping Do to Your Lungs? Johns Hopkins Medicine E cigarettes can result in 'Popcorn Lung' What Happens When You Quit Smoking & Start Vaping Vapourcore 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. Vaping, smoking harm lung health Stevenson Villager