Secondhand smoke and secondhand aerosol Curious about the difference between healthy lungs and a vapers lungs? See how vaping impacts your lungs, and why its best to quit early. What Happens When You Quit Smoking & Start Vaping Vapourcore Inhale this: What does vaping do to your lungs? If you vape, you inhale a lot of harmful substances. These can damage your heart and lungs.