E cigarette risk perceptions an American crime scene The Counterfactual 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 riskfree. How Safe are Electronic Cigarettes? About E Cigarettes (Vapes) Smoking and Tobacco Use CDC Healthier Alternatives: Health, child rights experts warn against use of e cigarettes, vapes, ETHealthworld How E Cigarettes Affect Your Body