E cigarettes may be harmful to health an annotated graphic Engineering & Technology magazine Vaping is NOT Harmless. Know the long term effects before it's too late! Most e cigarette liquids contain high levels of nicotine, which is highly addictive. Despite the legal age being 21, vaping devices The Health Risks Of E Cigarettes Versus Traditional Cigarettes Henry Ford Health Detroit, MI Notes from the Field: Use of Electronic Cigarettes and Any Tobacco Product Among Middle and High School Students United States, 20112018 MMWR