Is Vaping Worse Than Smoking? St. Vincent's Medical Center Vaping or Smoking Which is More Dangerous for your Lungs? CritiCare Hospital Smoking and Vaping National Institute of Environmental Health Sciences Vaping Contrast Rapport Western University It's official. Flavored e cigarettes cause permanent lung damage. And doctors are already seeing it happen. In the United States, a teenager developed something called popcorn lung after secretly vaping for three years.