First hand smoke comes from all combustible tobacco products. This includes Cigarettes, Cigars, Pipes, Hookah, and VAPES. This is the primary source of nicotine addiction. No amount of Second hand smoke is safe and Can You Get Second Hand Smoke from a Vape Risks & Facts Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Second hand vaping exposure very low compared to second hand smoking UCL News UCL University College London Secondhand Smoke vs Vape: What the Science Says