about may I was told by the doc's I had emphysema, they gave me a breathing test, today I had to have another,may is when I started vaping,and using a inhaler. the test today showed that my lung function was improved by 15%.the point is that using a e-cig will not hurt your lungs.if it did hurt the lungs I would not had haved the improvment that I have.I did tell my doc that I used a e-cig, he said o.k but don't get stupid with it. I thought that when I told him,he would pound me, but just got a o'k. he is a rabid anti-smoking doc.