Mouth to Lung (MTL) VS Direct to Lung (DTL) Vaping: What's the Difference? Healthy Lung vs Smoker's Lung Avant Medical The safest vape is the one you never start. Flavoured vapes were designed to feel harmless: Candy taste. Fruit smell. Cool packaging. Viral aesthetics. But your lungs don't care about the flavour. Vaping and smoking together increases lung cancer risk fourfold WHAT'S THE DIFFERENCE BETWEEN SMOKE AND VAPOR? Vape Domain