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. E cigarettes have public health benefits: Royal College of Physicians Doctors increasingly discourage vaping amid mounting health concerns ABC News Philip Morris iQOS E Cigarette: Electronic Cigarettes "Great Health Risk": Centre Bans Sales And Imports Electronic Cigarettes and Your Health: Maritza O Jenkins, DMD: General Dentist