Vaping substantially less harmful than smoking, largest review of its kind finds King's College London Smoking vs. Vaping: Is One Really Safer Than the Other? Have you ever breathed in secondhand vapor from a vape? What exactly are you inhaling? It turns out it's a lengthy list of chemicals. FULL STORY Vaping: Safe? Or Are Your Lungs Going Up In Smoke? Can Vaping Make Asthma Worse? Dr. Mayank Shukla