Vaping could harm your lungs, even within days or weeks of doing it. Don't let vaping harm your health. Vapor Hiding Dangerous Ingredients: E Cigarette Concoctions Are Far from Safe American Lung Association Vaping vs. Smoking: Is One Really Safer Than the Other? Vaping could harm your lungs, even within days or weeks of doing it. Don't let vaping harm your health. Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times