Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Hidden Dangers of Secondhand Vaping Emory Health Digest Secondhand exposure from vaping marijuana: Concentrations, emissions, and exposures determined using both research grade and low cost monitors ScienceDirect Just How Harmful Is Vaping? More Evidence Is Emerging. The New York Times Secondhand marijuana smoke can cause range of detectable effects, study finds Hub