How Long Does Second Hand Smoke Stay in Your System Thirdhand Smoke Resource Center Protecting Californians Does Vaping Cause Secondhand Smoke? Secondhand marijuana smoke can cause range of detectable effects, study finds Hub We protect kids from cigarette smokelet's do the same with vaping. Secondhand vape isn't harmless, here is what parents need to know: https: www.undo.org disease secondhand vape Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice