Health Problems Caused by Secondhand Smoke Smoking and Tobacco Use CDC Second hand e cigarette vapour increases risk of poor respiratory health, study finds Nursing in Practice Secondhand Smoke vs Vape: What the Science Says 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 Secondhand vape exposure: Risks and side effects Electronic cigarette Wikipedia