No, there's still no evidence e cigarettes are as harmful as smoking Science The Guardian Explainer: What are e cigarettes? U.S. E Cigarette Regulations 50 State Review An overview of U.S. state and territorial laws related to e cigarettes, updated quarterly by the Public Health Law Center. Do e cigarettes help or harm? Report says not clear yet Arab News Secondhand e cigarette aerosols expose kids to less nicotine than cigarettes, study finds, but can still be risky CNN