E cigarette Vaping Q&A Allegro Pediatrics Vaping Related Illness and Lung Disease NEJM Nonnicotine vapes may be marketed as safe, but many still contain chemicals, have unknown health effects, and aren't FDAregulated. Teens are using them more ofteneven alongside nicotine vapes. No ecigarette is risk free. Heated Tobacco Products, Cigarettes, and E Cigarettes: What's the Difference PMI Science Public Health Consequences of E Cigarettes E Cigarettes and Vaping OHSU