Chemicals Breathing in someone else's smoke or vape isn't harmless. Secondhand exposure can affect your lungs, brain, and overall health. Protect your families and yourself. Inhalar el humo o el vapor de otra SJC Public Health Services Did you know that vaping can have similar secondhand impacts just like cigarettes? It is known to be harmful and has been linked to Instagram Secondhand smoke and secondhand aerosol E Cig Vapor Or Secondhand Smoke: Which Is Worse For You? Do electronic cigarettes create thirdhand chemical residue? Thirdhand Smoke Resource Center