Doctors have linked vaping to a rare, incurable lung condition called obliterative bronchiolitis, often referred to as popcorn lung. The disease permanently scars and narrows the lungs' airways, causing lifelong breathing problems. Why is the Royal College of Physicians concluding e cigs reduce harm while ignoring the substantial associations between e cigs and actual disease? Stanton Glantz blog Effects of brief exposure to misinformation about e cigarette harms on twitter: a randomised controlled experiment BMJ Open Pannes et solutions Vap France