What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Vaping For Beginners: How Do You Inhale and Exhale Vapor? Medical Marijuana, Inc. Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct Smoking vs. Vaping: The Same Damage, Just Marketed Better! If your lungs could talk, they would tell you the harsh truth: Smoking and vaping both burn and damage your lungs, just differently.