Can Vaping Cause Lung Cancer? Here's What We Know. What Does Vaping Do to Your Lungs? Johns Hopkins Medicine 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 e cigarettes shown to be more harmful to lungs than smoking cigarettes new study Express.co.uk