What Does Vaping Do to Your Lungs? Johns Hopkins Medicine Vaping is often marketed as harmless. Flavoured. Trendy. Safer than smoking. But the reality is far more serious, especially for children and teens. When kids vape, they are inhaling addictive nicotine and Mouth to Lung (MTL) Vs Direct Lung (DL) Inhale Explained E Cigarette Direct Vaping Around Babies How Secondhand Vapor Smoke Can Harm Kids Marijuana and Your Lungs: Is Vaping Safe for People with COPD?