Look it up. Tired of ignorant know it all dip shits saying shit they dont know dick about. Look it up right now and you'll see that I'm right and your wrong. I was a smoker for 10 years I smoked 5 packs a day that's 100 cigarettes in a 16 hour day smoking 1 cig per 10 minutes. Vaping has changed my health and has reversed damage caused by smoking. My bronchial tubes have cleared. I can breath better, I dont sound like a power sander when I talk anymore, I dont cough at all anymore, I can breath 90% better, I don't cough up blood and gray matter when I smoke marijuana anymore. There is evidence and studies that have proven vaping can reverse some damage caused by smoking amd can even help people with serious diseases like COPD. I think I know a little bit more about this subject than you. Its not gonna heal or reverse any permanent damage but it makes me feel 100% better knowing my lungs are healthier than they were before and that my chances of getting cancer have gone down quite a lot.