0 popcorn lung from any smoker at any point in time. 0 popcorn lung in any nicotine vaper at any point in time. You are the one telling the world there is popcorn lung in vaping. where are all these cases? I can't find 1. If smoking that has 750 time higher doses of diacetyl than the worst e-liquid with 0 cases, how can vaping cause popcorn lung? A vaper will only have to vape gallons of diacetyl yearly for a few decade or two.