Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center E Cigarettes and Vaping PPAC Central E cigarettes: 'cancer risk close to zero' Bhekisisa 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. Dual Smoking and Vaping Doesn't Cut Cardiovascular Risk SPH Health Effects of Vaping