Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center E Cigarettes: Know the Health Risks Department of Health Dual Smoking and Vaping Doesn't Cut Cardiovascular Risk SPH 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. Vaping Related Illness and Lung Disease NEJM Health Effects of Vaping