First, Second and Thirdhand Smoke: The Differences and Dangers Tobacco Stops With Me While vaping is not risk free, it is less harmful than tobacco Our World in Data Secondhand Electronic Cigarette Aerosol and Indoor Air Quality US EPA Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Tobacco Smoke, Vaping, and Asthma AAFA.org Should I Be Concerned About Secondhand Vaping?