Secondhand e cigarette vape smoke exposure increased in last 4 years, contain harmful toxins: JAMA Network study ABC13 Houston Myth Buster ~ "Second hand vape smoke" is actually water vapour and is not harmful to other people or the environment. #vape #vaping #vapeuk #ecigerette #smoke #quit Researchers Warn of Potential Harm From E Cigarette Secondhand Vapor AZPM Scientists Warn Against Breathing in Secondhand Vape 'Smoke' Newsweek