Is Secondhand Vape Smoke Harmful Does cannabis create thirdhand smoke? Breathing in someone else's smoke or vape isn't harmless. Secondhand smoke exposure can affect your lungs, brain, and overall health. Protect your families and yourself. Inhalar el humo o el vapor de Daily Dose What We Know About Vaping Should I Be Concerned About Secondhand Vaping? What Does Vaping Do to Your Lungs? Johns Hopkins Medicine