What are the best mouth to lung (MTL) vape devices? Top Five Mouth to Lung Vapes Vape Shop Is Vaping Worse Than Smoking? St. Vincent's Medical Center Can Vaping Cause Lung Cancer? Here's What We Know. Vaping vs. Smoking Which is Safer for Your Lungs? Think vaping is the "healthier" option? Think again. Both smoking and vaping come with serious risks to your lung health, Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times