I feel strongly that vaping has had a very positive affect on my lung health. I smoked a pack a day until 3 years ago. Now I have been smoke free and have not had colds. Sinus infections or pneumonia for the past 3 years and I can only say that vaping has saved my life. I would still be smoking cigarettes and have bad lungs and stink. Now I do not have any of that. My house is clean and tar/nicotine stain free.