E cigarette flavors are toxic to white blood cells, warn scientists Health officials warned that vaping is not a safe alternative to smoking cigarettes, saying e cigarettes expose users to toxic chemicals and high nicotine levels that can harm the lungs and increase addiction. # Tobacco Free Campus Sign No Smoking, Vaping, Electronic Smoking E cigarette use to reduce cigarette smoking may not increase nicotine dependence Penn State Health News The 101 on e Cigarettes Infographic American Heart Association