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 Health Risks of Secondhand Smoke and Aerosols Factsheet US EPA Secondhand vape exposure: Risks and side effects Secondhand Smoke and Electronic Cigarette Aerosol Resources US EPA Study suggests switching from smoking to vaping indoors may reduce children's secondhand exposure to nicotine