In secondhand vape, scientists smell risk American Heart Association 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 E Cigarettes: The Complete Guide to Vaping in 2026 SMOKO E Cigarettes Chemicals found in e cigarette flavors tied to lung disease Toxicity, Chemistry, and Public Health Relevance of Emerging Nicotine Analog Vapes, Pods, and Pouches Chemical Research in Toxicology Mechanisms of E Cigarette Vape Induced Epithelial Cell Damage