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 Vaping Versus Smoking: Are Electronic Cigarettes the Savior? Arteriosclerosis, Thrombosis, and Vascular Biology Switching to E Cigarettes: Healthier Alternative or Hidden Risks? Be A Vape Free Teen Cecil County Health Department Cardiovascular effects of electronic cigarettes Nature Reviews Cardiology