Popcorn lung: What is it, and who is at risk? Harvard Health Ontario teen's vaping injury consistent with 'popcorn lung,' study suggests CBC News New lung scans prove vaping is toxic. The science is officially in. Scans show that teens have developed "popcorn lung" as a result of vaping. It's a permanent, chronic disease that shortens Popcorn Lung: A Dangerous Risk of Flavored E Cigarettes American Lung Association