for the last 2 weeks I have been feeling a bit under the weather with a chest cold. Today I went to the dr to get it checked. After the normal checks, he listened to my chest. For the first time in 30+ years I was told my chest sounds good with clear lungs!! I've been vaping for a little over a year and this is the first dr visit since then. I can't believe it. I smoked at least a pack a day since I was 15. At 46 my chest sounded like a wheezy gravel pit and a year later I was told it sounds good and clear, like a non smoker. All I can say is wow.