Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Is vaping as bad as smoking cigarettes? BBC Learning English from the News Are there passive smoking risks from e cigarettes? Horizon Magazine Secondhand Exposure to E Cigarettes Puts COPD Patients At Risk Respiratory Therapy Secondhand Vape Exposure: Effects, Who's at Risk, and More Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA