Vapers & Hookah Smokers Exhale Through Nose More Often Than Cigarette Smokers NYU Langone News MTL vs. DTL inhaling demonstration Smoking and vaping are often compared, but neither is harmless. While they work differently, both can expose the lungs to addictive nicotine and harmful chemicals that impact breathing and overall health. Smoking 5 Vaping Facts You Need to Know Johns Hopkins Medicine