The Health Impacts of E Cigarettes JUUL E Cigarettes Harrison County Health Department 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 Teen Vaping Crisis California Teachers Association New study comes the closest yet to proving that e cigarettes aren't as dangerous as smoking